dude, just go to newegg.com click on more categories on the leftside of the web page, go look for heatsinks, when you go that page, it will ask you cpu type and tyope that in there. and ull find what you need dont get for 6 dollar ones, get a really good one for around 23 bucks and up and get one that have 4 to 5 stars read the reviews.
im too good for a sig :p heres my specs
system specs: 2.0 ghz amd athlon xp 2400+
radeon 9200 SE vid card :(
60 gig hardrive
32*Cd-rw and 16*DVD drive
17\" CRT monitor
mushkin 512 mb pc 3200