If the disk just needs linings, just about any brake and clutch shop can do those - you just need to tell them how thick the linings need to be. I'm going to guess at 3/8 overall (3/16 each side) but maybe they're 1/2 new. If you figure out what it's supposed to be, let us know because I need to get my disk relined. The bearings can be had from Cat or any bearing store. The thrust bearing is just a regular ball bearing - I haven't researched whether it can be substituted by a "proper" thrust bearing. The pilot bearing is the same as a D2 thrust bearing, judging by the part #

Update - the pilot bearing outer race I have for it is a Delco Hyatt OR304 which should cross to Cat 1B3740. There is a roller assembly which per the D2 manual is 1B3739 and the "inner race" for the pilot is actually the transmission shaft. The thrust bearing I have is an SKF 6209-2Z/C3 - don't have my Twenty-Two parts catalog handy to get the Cat # but will later if someone doesn't beat me to it__PRESENT