Welcome to the forums, newcomer!
Back in the day people used this;
http://www.prolimatech.com/en/products/detail.asp?id=155&subid=408
to cool their high end Core 2 Quad's, and I went with watercooling, like full blown watercooling. I doubt you'll find a beefy cooler for the LGA775 socket outside of Ebay(or a second hand marketplace).
Hey there everyone! first time posting Build log - so be nice if I go off topic alot. This WC build is for rig 1: Q9550 E0 Asus Rampage Extreme w/Supreme FX X-Fi OCZ 4GB 1333Mhz DDR3 Platinum Edition Corsair H50 modded w/ Fusion block system, dual rad w/ p/p 320GB WD Blue 16MB - OS Drive...
forums.tomshardware.com
is the build log.