>>358521134
https://vrcover.com/product/valve-index-head-strap-cover/
it's a kind of an insulting price for what is pennies of fabric and velcro, but such is a niche hobby. I like their PU leather gasket replacement for the index too. I also have their silicone rubber gasket; I personally don't like how it feels but others like it more over the PU leather.