https://blendsbybryce.com/
These are sold by a guy who got his start here from my understanding.
My
juice from him is steeping, but from what I can tell so far his products seem to be great quality.
I don't dare taste them yet as I know my bottles will be empty before they steep and I really want to judge them in thier prime.
You may want to get verified for the classifieds and look threw the juice swap section as I believe you just can't sell homemade juice.
The only places I've seen using premixed flavorings and then adding nic and then pg/vg are small brick and mortar stores.
Mine locally do it and do it by sight with no measuring what so ever, I stopped buying my juice like that a year ago when I found I had no consistency in my juices what so ever.
I use Giant Vapes for juices bottled at the maker and sold threw the site, no mixing happens there that I'm aware of.
Plus it's all presteeped and many of the juices can be hard to get on your own.