Try calling Surge Friction in South Holland, IL. They are or at least were very good about the odd ball stuff. I once slapped a disk on the counter, and with one glance, at it he said "Peugeot Diesel" Yeah, we got that!
Custom made some disks for my semi when I was having trouble with clutches doing heavy haul.
Haven't delt with them in 20 years or so, but worth a try.