With all the hard distilling work done by NicoBrand, we don't need Nick
Only joking Nick. But if it were possible to get hold of nicotine at this purity (and effectiveness) then I might start the 'Elephant' no deposit juice range myself!
Go for it - I'll be your first customer. I'd frankly rather pay someone else to do the industrial compounding

I'd always prefer to play with flavours (damn, this absinthe is gooood!) Nicotine's the drug, but where are you going to get a perfectly formulated tiramisu-flavoured vapejuice? (I'll give you a clue - it ain't gonna be Watson Pharmaceuticals

)
Very interesting in any case is the fact that it shows both that a very pure nicotine is possible (and from tobacco too) and that it can be freebase. That's what I want to see in our juices
Sigma-Aldrich sell freebase nicotine (99.8% pure) for about £1/gram.
But like I say, the cost of the ingredients is not necessarily the most significant factor if you set up a commercial lab (that's why lo or no-nic costs the same as XXXhi-nic. The cost of the nicotine isn't a very relevant factor in the pricing structure.) It will have to be kitted out to approved standards, inspected regularly, lots of hassle and expense (and all the more so with a product intended for human consumption.)
You really can't do this safely or legally in your kitchen or a spare back room - Trading Standards and/or Environmental Health will close you down (unless you kill yourself first,) if you can't demonstrate that the product is handled and formulated in a safe environment.
Apart from anything else, you're not allowed to rinse nicotine down the sink - it's an environmental toxin. You'll have to satisfy them that every stage of the process is safe to the immediate environment, and that the product is safe to ship, and safe to consume. That suitable waste disposal arrangements are in place, that suitable protection is afforded to prevent or contain accidental spillage or leakage, that the extraction hood you're using is properly filtered to prevent atmospheric release (don't even think of doing it without a properly ventilated negative pressure cabinet.)
A 36mg juice is 3.6% nicotine, so that 100g smallest size will go a long way - about 3 lires of 36mg juce!! Wonder if they'd sell it if diluted to say 10%? Will you give them a call? No harm in asking.
Open a business bank account in the name of "Elephant Enterprises" or somesuch first, and they'll probably be very happy to do business with you.
If not, go to Sigma Aldritch. Sigma will only supply chemicals for research (not for production,) but hey, we're all guinea pigs anyway in this game

If they want to know what it's for (they won't,) tell them your working on insect control.
I'm tempted to say, if you want to buy a kilo of the stuff (if it's cheaper that way,) and put a group order together, count me in for a couple of hundred grams

Disclaimer: that's dangerous advice, offered more than half in jest. Seriously - this ****'s dangerous. But it might be possible to put a group order together if we can get it ready-mixed with PG, or if we can find someone with a safe lab environment to mix it in.