There is a tag on the changer itself that identifies it as a 50hz unit. The motor mounts are solid and the rubber idler wheel is undamaged.
Sorry i missed that originally,
If you feel like being a mad scientist, you could find a 50 Hz UPS and a 220 V to 120 V step down transformer - the later are really cheap, everyone traveling from Europe buys one. Drive the UPS with a DC supply since the batteries are always what goes bad. Or even better, especially if you don't have DC supplies lying around to dedicate to a changer, drive it with the front end of a 60HZ UPS which are always junked because the batteries are toast. Make sure the DC voltages are the same. You could rip the guts out since the batteries are the bulky items. Sounds like fun, if a little crazy. Maybe a lot crazy. You would have 50Hz power though which is pretty cool.
I can't wait to hear what Repair tech thinks about this idea.
Or find a 60 Hz pulley for your machine. Or calculate the pulley diameters for 60 HZ based on current diameters and have the pulley machined down - should be linear 5/6th of original diameter. You might even be able to do it yourself with a dremel tool, calipers and emery cloth. Or buy a 50 HZ generator and a big diesel tank and run a cord in to power the changer. Or move to Europe. Just kidding around with the last paragraph.