Rift-S foam face replacements?

Yes the headset is very old now but it works and none of the newer ones out there interest me right now. What I'm trying to find is a vendor that still offers the replacement foam face part. I could go with silicon if they offer a cloth cover but just silicon irritates my skin. I had the kiwi set but they are 4 years old now and are crumbling apart and its time to find a replacement. Unfortunately it looks like Kiwi no longer carries them. I briefly looked on ebay but buying a 'USED' one is not something I'm interested in doing at least for the foam ones. Cloth i could wash. Anyone have any recommendations?

thanks in advance.