Mr. Grimme, unless you have a strong background in working with toxins and/or hazmats, and have a fume hood and other expensive safety lab equipment, I would suggest not working with pure free-base l-nicotine. Yes, it is legal, and yes, if you try hard enough you can purchase it. As a chemist, I know of a couple places off the top of my head where you can buy it, but you will be lucky if they sell it to a non-researcher in industry or academia. Even if you know what you are doing, the expense of the equipment needed makes it a rather unwise venture for anyone other than someone planning to produce and sell a lot of ejuice. I am a seasoned chemist, and I will not touch the stuff. 50 mg ingested at once will likely kill you. 20 mg all at once may not kill you, but you will wish it did. And it absorbs through the skin.
If you want to get into DIY, I strongly suggest starting at 30 mg unflavored PG or VG, to work out the details of DIY with a safer concentration. Once you are good at it, and it IS messy in the beginning, and have created a safe zone for it away from your child, you can increase the nic conc. Truly, for even a heavy vaper, a couple liters of 100 mg stored in a locked freezer will likely be all you will ever need. And it would be far cheaper overall than trying to set up to work with pure nic.
BTW, Bliplabs does not sell pure nic. The link given was for 38 mg/mL solution. I they may go up to 100 mg/mL, but not pure. You will not find a vendor here selling pure free-base nic.