Your best bet is simply to make your own eliquid. Do the research, eventually your own is the best you will find. After all, its tailor made (customized) to your OWN tastebuds! Not somebody else's!
If you are so devoutly vegan then how on earth can you bring yourself to smoke tobacco knowing what terrible damage it has done to countless human animals over the decades.
I'm really not one to criticize others for their beliefs regardless of how ridiculous I might think they are. But I have to say that's an awfully tall horse you're sitting on :/
All this talk about animals is making me hungry.
I have been vegan for the past 8 years and the only advice I can impart is to not let it consume your every waking thought when it comes to nitty gritty details. Just do your best to avoid products with animal by-products and companies that use animals for testing. You will never be able to be 100% vegan unless you make all of your own food, clothing and e liquid, and that is a lot to ask of anybody.
I will second the Velvet Cloud Vapor recommendation that someone else gave earlier. Theirs is the only liquid I use and I am quite satisfied, regardless of the price. If you have been a vegan for any length of time you already know there is a price to pay if you do anything but grow your own food, make your own clothes/shoes, etc. Personally, I am willing to sacrifice a little extra money for the time it will save me in the long run.
Quite frankly, there just aren't enough vegans and vegetarians in the marketplace for companies to take us into consideration when they make big decisions like how they research, develop and produce their goods. You also have to keep in mind that this particular industry is very new and quite small, relatively speaking, and any effort made by a company to make vegan liquids is going to come at a cost that will inevitably trickle down to their customers.
In short, you can't have your cake and eat it, too. Best of luck!
I was the one who recommend VCV and I appreciate you seconding my sentiment. VCV is one of those companies who would do their best to accommodate you and since they are not using any PG and they extract their own nicotine and flavors, it would seem to me that they have less chance of having any of those mass produced products that the OP is leery of.
p.s. I loved your post.