You say you wouldn't build it yourself but would you be installing it yourself? If not then it might be better to find out about a good service place in the area and talk to them about the options, what they think is best and what they have experience with. Other info:
-Rocky Road use Old Man Emu spring lift plus spring spacers, you could use Old Man Emu on its own if you don't need as much height (1.25").
-Calmani make a lift
-Other manufacturers make springs that will fit like Tough Dog and Rancho
I don't have a lift but that's what I can recall from my reading, I'm thinking of the OME lift but since I don't have spare $$ yet I'll be keeping my eyes open for anything else.