Glad to hear you're doing your research. Kudos for being responsible!
It'll probably work best to just call around all the local stores and ask if they carry the kind of bettas you're looking for. You can also check around for local betta breeders whom you may be able to arrange a sale with. Aquabid also has a search function where you can enter your state, so you may be able to find a vendor there who lives in your area and will let you come pick the fish up.
i will most likley be feeding egg yolk and bbs... then hikari first bites? still doing the research...
Live food is best because it will stay alive longer, thereby not polluting the water as quickly. I recommend microworms and vinegar eels as well. I keep a few containers of vinegar eels at all times, as they're *so* easy to culture. That way anytime I see fry in a tank, I already have food for them.