Sounds good, better to be safe than sorry, if you have any chemistry skills and a little free time I can make a walk-through for you to extract and purify some nicotine at your house and you can mix it with glycerine and water to make sure you aren't getting something crazy from the commercial manufacturers (I did a toxicology report in Jan on the known ingredients and some of them were crazy and had no business being smoked, I posted it on this forum if you want to see it just do a search for "satire toxicology report").
The MAOI part is true in that they are in tobacco, but be wary of any "scientific claims" you read on this forum (including mine, I'm not in med school yet) because a lot of people here state rumors and explanations from vague, unqualified, or simply poorly read sources as facts. MAOIs are simply inhibitors of mao (enzymes throughout your body that break down amines, like amphetamines, tryptamines, ......., nicotine, many natural neurotransmitters etc. via oxidation, hence the name monoamine oxidose) and thus inhibiting them just slows the breakdown of nicotine and other naturally occurring amines. As far as "cold-turkey," the MAOIs in tobacco are really MAO destroyers that permanently disable the MAO they latch on to (compared to temporary inhibitors like harmaline that leave the binding site within a few hours, restoring MAO function shortly), and the body takes weeks to restore that, so the only thing from going cold-turkey that is missing is the nicotine, not the MAOIs (as least at first, this may also explain the symptoms noticed in the first few weeks of e-smoking as the enzymes become active in the body again but I have nothing to back that up except theory and instinct), and the e-smoking replaces the nicotine.
I personally had no problems switching to e-smoking (did have some side effects like irritation and my muscles would be sore for a couple days after a minor work out which doesn't usually happen, and perhaps a minor haze but as I mentioned I've spent plenty of time wandering around in a haze, many of the substances I have used in the past were not illegal pleasure-inducing drugs but various psychoactives with far ranging effects, and all of those e-smoking side effects cleared up with time as have most people's), I didn't even think about cigarettes because the amount of nicotine was more than enough for me, certainly didn't feel like I was "missing" anything (nor did my grandmother, a stubborn smoker of 50ish years who quit a couple months ago after I convinced her to try it out). I switched on Nov 5th of last year, and have bought 3 packs of cigarettes since then and only smoked about half of them, and those were with friends and such at get-togethers, I never feel a desire to smoke an analog when I'm by myself even if I see someone smoking. In the words of Tropicalbob: "It keeps the demons at bay."
I wish I could confidently offer you an assurance of safety from the commercial e-liquids but they contain tons of crazy **** and only a few of them ever released lab reports detailing the chemical compositions of the liquids (a few months back there was a public demand for lab reports from the bigger USA suppliers but as the forum population exploded the suppliers eventually stopped even replying to them and it went by the wayside), so I can only assure you that the nicotine, PG, VG, and ethanol used in a basic formula are not going to be dangerous (really the only thing needed to make a working liquid is pg or vg, nic, and a little water and perhaps a hint of vodka or grain alcohol which seems to help it mix up and vap nicely, I've made it myself at home and it only took a couple hours with a hotplate and sep funnel to turn a bag of rolling tobacco in to nicotine hcl crystals which I dissolved in some glycerine with a bit of distilled water and a tiny amount of vodka and it worked great). However, if you don't want to make your own I would refer you to the "totally wicked" stuff from pillbox38, they seem to have their **** together and were one of the first to release the ingredient list as well as selling it in dark brown glass bottles with childproof caps and warning labels, and it definitely has the nicotine in it so you may want to give it a shot (plus 3 days from order till arrival, serves UK and USA, a class act all around).
Good luck to ya and if you do give it another shot be sure to be well-informed about what is in the liquid you are getting and what it does in the body, and keep in mind that the MAO levels in your body will be adjusting for a bit after you stop using tobacco and that alone can cause some strange effects because they affect tons of other processes in the body (this is why they usually wane people off prescription MAOI medications instead of just dropping it at once), so there will be a transition period but most everyone who has made it to the other side is glad that they made the journey.