The Vesper Audio pads gave my L300s a new lease of life : r/headphones
Amazon.com: Brainwavz Sheepskin Leather Replacement Ear Pads for Sony MDR 7506, V6 &CD900ST with Premium Memory Foam Earpads & Suitable for Other On Ear Headphones : Electronics
Velour Earpads Replacement Ear Pads Pillow Foam Cushions Cover Repair Parts for Razer Kraken pro 7.1 Gaming Headphones Headset - AliExpress Consumer Electronics