Pretty much any place that works on cars could lift your truck. Like straycat said, call a tire shop. Tire shops usually do things like replace control arms, replace rear axles, things like that. Even a BODY SHOP could do it for you. I'm a painter and my shop has done numerous frame swaps on heavily damaged vehicles, if you can swap a frame you can install a lift.
If you buy the lift yourself you won't have to pay the markup a 4x4 shop is going to charge you, then you just call up the tire or body shop of your choice, and they would have it done in a few days barring there aren't any other problems with the truck that need fixed.