Try searching. There are tons of posts here. Lots of people will steer you toward Rock Krawler lifts but they aren't cheap. The more you lift, the more it will cost as you also have to replace dreveshafts, etc.
9/7/11 2012 Black Rubi
Yaesu 857D // ACE Rock Rails // PSC Brawler Lite // Warn VR8000 // Duratrc 315/75/16 MB72 // RK 2.5 Max Travel // ACE Rear Bumper/Tire Carrier