Summit is a pretty good place to get that stuff from. Which bearings are you planning on replacing? They would be carrier bearings, pinion bearings and then axle bearings. Rebuilding the trac loc is a good idea since you already have it all apart. I am not at my personal computer right now but I have a good angelfire site saved on it that will pretty much guide you through it step by step and give you an idea on how big a job it is. I will post it up as soon as I get home. If you need it before then do a search on my name and it should be in some other posts about rebuilding diffs or changing gears.
I had my rear end go out on me and i was just going to replace my wheel bearings and seals, then decided to make my rearend a little stronger, I am now buying all new internals and control arms, and drag springs and struts. I was gonna have a guy by the name of Gary at Trans Express in Apopka 407-814-0202