I found one belt that had Natasha on it (with Iron Man, Captain America, Hulk, and Thor - no Hawkeye, the blasphemy) at Spencer's today, and that's the only thing I've been able to find. I mean, c'mon! Talk about LAME.

EDIT Superherostuff.com has Black Widow AND Hawkeye merchandise! *FLAIL* But seriously, in physical stores, so little to be had.