There is Mother's Milk too,
Whole-Tobacco-Alkaloids-WTA-Nicotine-Nornicotine-Anabasine-Anatabine WTA e-Liquid Bulk WTA e-Liquid but I have found it concentrates in my tanks, sediment I guess. And that's their unflavored.
I bought all 3 a few months ago. One was really thick, like syrup, so I had to cut the strength to thin it. It's ok if you're mixing with regular nic, so you can boost it back up if you want. I thought it was a pain.
It might have been Aroma's DIY. I think it's 100% VG. Maybe someone knows. Their website is cumbersome to say the least too, so good luck.
There was a thread around then. I'll try to find it. See how it hasn't helped my brainfog.
I didn't noticed a dramatic difference, but I may order some more. Probably Aroma.
I'll be interested to hear your opinion.