I don't know if you have tried, but I'm sure if you were to ask in the 5th gen section someone would be glad to offer up tools/time/assistance to help with this just an idea. That way instead of paying a shop hundreds of dollars to install a lift, you could provide a couple cases of beer and get to meet a few knowledgeable fellow 4runner owners and see/share the passion they have for these great vehicles.
Also nothing like getting to turn the wrench on your own vehicle and getting to know it better as well. . .just a suggestion.
Hope to see a build thread once you do purchase it!