Drs. Foster & Smith have Badis badis I think..
If you join one of the Badis/Dario yahoo groups:
http://groups.yahoo.com/group/badisbadis/http://groups.yahoo.com/group/badis-dario/you'll find that some folks are having some great success with them and are more than willing to part with some hard to find species to those who'd like to breed them and get more out there.
Aquabid also has them and other Dario and Badis sp. listed form time to time.
I'd like to try some Badis sp. but since they are generally larger and require quite a bit more space to house than the smaller Dario sp. I'll wait till I've got more room and time.
