I'm pretty sure any of the reputable LFS
in/around Seattle will take the fish in for credit if you don't end up wanting it. If you're unfamiliar with the area's stores and need some suggestions for places to try, give me a PM.
Putting a pseudochromis in a 12g with a clown (or much of anything, for that matter) sounds like trouble to me, but I've never personally owned one. (A pseudochromis, that is.)