Got him in a store. Remember these fish are particularly seasonal as they are wild caught from the amazon. So during the amazon's dry season, they will be hard to find. When it gets to Sept/Oct ie the wet season, they are in all the LFS stores in Scotland/England. I bought mine in a LFS here during the wet season. I've had him about 8 months now was about 1.5 inch when i got him. now over 7!
You could try a tropical fish online finder that ships. I know many websites that let you locate a fish then ship to your door but they are .co.uk. There must be tones in the USA? Give it a try let us know if you get one.
Price varies wildly but here mine's was £14