David,
I have one 3-piece McCauley wheel from my 150M (s/n 15077417). It is left over from when I converted the McCauley wheels and brakes to Clevelands. This wheel is serviceable as I later loaned it to a fellow club member, who used it while he was preparing to convert his plane to the Clevelands. I am willing to part with it on a permanent basis because I cannot use it as a spare. The bearings are also included.
It will probably be Monday before I will be able to go to the airport to check the exact part numbers on it.
Richard