There are some being bred in the farm,
i don't know if anyone imports the farmbred ones from asia around the US?
I've seen a lot of farmbred specimens of the dennysi group coming by in great shape,
otherwise you could look into the Polypedates leucomystax, can prove quit forgiving regarding temperatures and humidity.
It's true the WC specimens tend to have all kinds of illnesses, mainly due to the method of capturing and transporting,
the farmbred specimens however seems to be handled better and don't have the problems seen in WC ones.
Rhacophorids are not the family i would reccomend beginning with either.
They are prone to stress, and if you finally succeed in acclimizing them, a little mistake puts them back in the shape you got them in.
Stressfull for them, and you.
However, keep in mind that all of them need to be housed rather large.
I don't know the tank size you got available, but i think it won't be big enough for a treefrog looking at the species it was for.