I don't know where you are in Texas, but there is a feed store here in San Antonio that gets a bunch of bantams in and we got three chicks from them last time we were there. The only thing is that they all come straight run so we don't know what we have yet.
Another place is Ideal Poultry in Cameron Texas by Waco. They are a good hatchery and sell lots of different colors of bantam cochins. Depending on where you are, you could make a drive and pick some up.