You can get the locker at many of the better Toyota sites like Marlin Crawler, Trail-Gear, Low-Range Offroad, etc., plus sites like Randy's Ring and Pinion. For tires, 33's give the Runner a nice look without going too ballistic, and you can either lift a few inches to clear, or some of the guys on here like to pound out the fenderwells and leave it at stock height. Rancho shocks are excellent quality items. I'd get on the "classic" section and search for the tire clearance mods--my personal preference is a small suspension lift, maybe combined with a 1" body lift. Ask around the "classic" section--there's lots of good advice to be had there. Best of luck!
p.s. With 33's, you will want to regear as well, or you will feel a definite drop in power. 4.88's work well for that size tire.