Check out 4Wheel parts at http://www.4wheelparts.com

Here is a link to the Superlift for your 4Runner: http://www.4wheelparts.com/product2.asp?imseqn=493&occlass=SUP&cat=SUS

Couldn't find a direct link to the Procomp lift, but I know they sell it.

I know a lot of the guys on the board here will tell you to save your money and do a SAS, but if you don't want to do that, then the 4" lift is the best bet. If you don't want that large of a lift (or don't want to spend close to $1000 for the suspension lift), you could always do a small body lift 1" - 2" (get one from Roger Brown on the board here.. name is 4Crawler) and coil spacers or longer coils in the rear, and crank the torsion bars in the front (beware of this though... cranking too much will cause you to tear them if you take it offroading!)

Hope this helps.

Edit: Also watch the For Sale forum on this site. I know a lot of guys sell their suspension kits when they do SAS... so if you go that route it will be cheaper for you.