Yep, definately look into breeders and aquarium stores. The aquarium specialties might not have the best selection, however they are healthy. My two I got from Petsmart, and I didn't really have issues with them, only one issue with my first betta that I'm still confused about, but he's okay. When I went with my brother to get him a betta, we went to about 4 different stores looking at them, and finally got one from Aquarium Creations, and he's extremely healthy and doing well, despite my fish killing ignorant mother.

If she can keep a betta, you should be able too.