Small Kitchen Supply Store?
I know of a small restaurant supplies store in Alhambra. It's called T & T Restaurant Supplies on Valley Blvd, a couple doors west of Sam Woo. It's much smaller than Surfas but has a bit of everything and the quality's pretty good too.
530 W. Valley Blvd
If we knew what you were looking for it might be easier. Smart & Final has some stuff. There is a place in Burbank on Glenoaks across from the Carl's Junior, I forget the name. Charlies Fixtures on Venice one block east of Western. Alpine Fixtures on Washington just west of Western. There is a place on Walnut in Pasadena. Search the Yellow Pages for Restaurant Fixtures.