yeah mine is a stock jeep unit and the 1-1/8 according to 4wd will not work due to pilot bushing is .75 of an inch I.D. I think I might have found a universal one that has a bunch of different bushing size's. There is an .749 size, can't get much closer I guess.
I was looking for one also and decided to drive down to one of our local repair shops. I just walked in and asked if I could borrow one. He gave me three or four to try and I brought them directly back to him after use. I offered to give him something for the rental, but he wouldn't take anything. Great guy. I didn't have one that fit exactly but close enough.
I have used nothing more than a long 1/2" extension and a little time to line up a clutch disc before. It just takes a good eyeball and making sure the disc is centered around the outside of the pressure plate.