Thanks for the reply!
I'd love to use a full flavored natural vanilla, but I haven't been able to find anything strong enough to work for e-liquid. If someone could point me in the right direction, I'd appreciate it muchly!
This might be what you are looking for. Perfumers Apprentice has a new vanilla which is Vanillin Crystals 10% PG
"We have dissolved Vanillin crystals in PG, for those customers who would prefer not to work with vanillin in crystal form"