The previous owner of my bus so helpfully decided to remove the armature from the AC compressor clutch because it was loose and making noise and then threw it away.
Attached are some photos of the clutch and compressor serial #. Just replacing the disk that is missing from the armature might work althought the repair manual says the rotor which is the entire pulley and the armature should be replaced as a set.
I haven't found any clutches for sale on the internet that look like mine yet. The clutch is a warner. The compressor is a 05k but I believe this clutch was also used on the o5g. The outside diameter of the pully where the belt goes to the crankshaft is about 9.46 inches and the diameter of the pully that goes to the alternator is 10.35. It has a 24v coil which I think is good. I believe the carrier part # for the complete assembly is 50-01122-21 the # for just the rotor/armature is 50-01122-99
I would be happy to buy a used clutch assembly from someone who doesn't need it. If anyone has an idea of a salvage yard or retailer that has reasonable prices on new clutches that would be great.