Huh. For what it’s worth, the Chinese lambskin (not generic “leather”!) pads that you can get for ~$15 from Aliexpress, Geekria, etc. work as well as the official ones in my experience. (For other headphones, you can’t always get generic replacement pads made of the same materials.) The only difference I’ve been able to discern is the L/R labels are printed using a different technique.