Razer opus replacement cushion

My product is out of warranty, so there is no chance of getting proper support. However, I would like to *buy* replacement earpads. I was disappointed to find out that despite there being a guide for how to replace the earpads Razer does not seem to sell replacement earpads for the Opus. Is there anywhere I may have missed where I can buy them, or if there's a third party seller that makes them