replacing analog controller on Sony PSP-1000

[hitbyambulance]

so the stupid nub kept falling off, until the socket finally split. i attempted to glue it back onto the PSP, but all i managed to do was dent the surface of the analog controller mechanism and now it doesn't work correctly. it looks like the replacement is simple, but i'm wary of buying an inferior component - what are the best places to order from? i don't mind spending a few more dollars if i can be assured of getting a quality or OEM replacement.