I realize that info would have to be private, but is there amywhere in Canada to
buy straight Nicotine. I've just realized that PG and VG can be bought at pharmacies rather cheaply. I'm paying much more for premixed PG/Vg to use for adding flavours.
If you plan on buying anything over 36mg/mL, please use appropriate precautions, such as latex gloves, a clean work area, and even safety glasses. Keep all pets out of the room. If you spill 100mg/mL on yourself or others, there is a very real risk of poisoning. Nicotine absorbs quite readily transdermal, and at that concentration, 1 mL can kill an adult male.
I'm sure you know the risks, but I have to say it.
That said, here is another el-cheapo supplier:
Box Elder Chemical Supply
If you're really worried about customs, there are some Canadian vendors, but the prices can not compete with the States due to availability.
http://www.elektrajuice.com/ is new to the scene, and not really DIY. Perhaps a good stepping stone.
buy unflavored, add flavoring, done. No need to mess with high concentration stuff to save a few dollars.