Have you looked at 3rd party replacement pads? I've never seen a pair of headphones with removable pads that I couldn't get an aftermarket replacement for-- usually better quality than the factory ones. Big round ones, smaller ovular ones, memory foam, leather velour or whatever finishes... always managed to get something that fit. Just measured and looked for something close. They mostly seem to attach the same way.

Most recently, for a discontinued Audio Technica set that did not match any of the standard AT pads, I got replacements from Wicked Cushions.