I've not gone on their site, but have your tried Olson's gaskets at www.olsonsgaskets.com? GWH
I don't know about online access unless you have an account setup, but Regal would be one to try for the 4.5" bore sleeves. I expect there are other sources for those as well. The 4.25 are the ones getting scarce I believe. Jim Zimmerman is supposed to have the 3.75" sets and may have a source of the others as well. I would call CAT and inquire about their classic line parts to check prices on anything you find.
Bret,
Best wishes on your 7U adventure.
Cat for gasket sets, Olsen may have them but... Cat is cheaper.
Bearings, Motion Industries is where I found a lot of roller and needle bearings
Hastings for your rings
Cat or ..... for the rod bearings and main.
Are you rebuilding in place or not ?? If not then you may want to think about re-maning the clutch but if your re-building in place then forget this.
CMD
Thanks guys. I'm just looking and figuring at this point, the liners and pistons I have are okay. And yes, I'm fixing it in place. Sure appreciate the help.