That would be the dekoni X00 sheepskin pads. They are about $80 (still pricey, I know) and you have to email dekoni to order them since they where intended to be a “massdrop exclusive” but they are more comfortable than the stock pads and sound very similar if not a bit better imo. Also most pad swaps need attenuation rings to sound proper, so if you haven’t, try those first. You can make your own if you have some roughly 0.5mm thick plastic that you can cut with an exacto knife. Here are some pictures with measurements if you want to make your own.