Well although this is an old thread, I have a few ready to go. I would have a lot but in the middle of the summer I came home and needed to fix something in the one aquarium not realizing I was still covered in Deet. It turns out its very good at killing snails.
So I have some light striped purple, maybe a chestnut and ivory or two. It turns out I sold all my gold ones and didn't keep any so none of those.
Normally I just see golds and wild-colored ones in pet stores. I don't think I've ever seen striped purples at a pet store but they aren't considered rare or anything in the way of snail colors.