I'm not sure as I am not a member of the IBC or the species program.
However, many of the splendens complex of species are highly endangered due to both habitat destruction and hybridism. Setsuna who is a member here usually has some pairs of various species for sale, or can put you in contact with someone who does.
If you are going to get serious about breeding wilds, the best thing I would advise is to do a lot of reading first. Their needs and care requirements can be quite different from a domesticated betta depending on their species.