Hmm. That's a server cpu, and an old platform. Let me look.
Anyone else, please jump in!
EDIT: Got a price range? I see someone who's happy with a water cooler, but it's fifty bucks and probably not worth it for you. Something from here perhaps http://www.thermalright.com/products.html ?
I guess you will have a hard time finding a "budget" cooler for something that long out of stock. You might try looking to see if anyone has a used one in a parts drawer.