For those that continually want to know where they can find wild Betta species there is one source I can recommend above all others.

Mark Denaro is one of the best suppliers of tropical fish I know and does a really good job keeping wild Betta species in stock as well as a lot of other hard to find fish and some of the more common species.  You can check out his website or join his yahoo group with the same name, Anubias Design.