Aavid Thermalloy's P/N 552507B00000G looks real close to original. I don't know where you'll find this in your neck of the woods, but perhaps have your favorite electronics supplier see if they can acquire some.
I got a lot of 5 of them off eBay US just now for about 13 bucks. I'll post back once they arrive, and I can ship you one if needed.
