motherboard parts suppliers?

[ronhaha108]

Hey, I've got a motherboard with, dunno what it's called, but it's the piece that the cpu heat sink fits into and has 4 places where to clasp the heat sink. The piece is plastic and has 4 screws holding it in, one of the clasp points is broken and I need a replacement... of course I could probably buy an old motherboard off of ebay, but thought there might be a place online to buy this type of part. Any idea?

btw, the heatsink cools down a P4 478pin cpu



Thanks!