[COLUG] Motherboard Question

[matt at mattgardlik.com]

My computer had recently been shutting itself off due to the CPU
overheating.  So, today, I cleaned the inside which was pretty dusty, and
took off the CPU fan to clean the dust out of the heat sink.  When putting
the heat sink back on, I accidentally broke off one of the plastic
mounting teeth that holds the heat sink to the motherboard.  It's a year
or two old socket 754 AMD64 motherboard.

Is it possible to replace this plastic mounting piece on the motherboard,
or did I just ruin an otherwise perfectly good motherboard?

Matt