I'm hesitant to provide information I'm unsure of atm.
There's a ton of wc vampires, but 90% or more die. Others are home bred, but sometimes don't have the bright colors.
Bob's tropical has them (mixed reviews on there as a seller), and Alpha pro has them.
I'm still setting up my viv. I started with the idea of a 10 gallon, but I have these 3g long acrylic tanks I haven't done anything with. I think I'll use that instead, and go the plain and simple route.
My plans with the carved styro just won't work as vampires like to burrow and dig. Plus, the only time they use water is for molting, so no use having a large area for that either.