Are you looking for Central American cichlids?
I would check out Hung Ming Aquarium (in Daly City, just south of SF) and King Aquarium (in San Jose). You may want to call first, as I haven't been to either store in several years. Hung Ming in particular used to have a really nice selection of CA cichlids. I've heard King Aquarium has gone downhill, but they used to have a some nice fish on occasion.
Neptune Aquatics (in San Jose) is super nice, but they mostly have dwarf cichlids and discus.