I have wired headphones as a backup to my wireless ones and I lost one of the ear pieces. I got on Ebay and found what I needed at a great price. They work great and even have spares.
Bose QC-35 And QC-35 II Over-Ear Headphone Ear-Pad Cushions Replacement In Creamy White
32 Review
Replacement Earpads Cushion Cover For Razer Kraken Pro V2 Gaming Headphone (Grey) - Compatible With Kraken Pro V2
17 Review
Silver Replacement Ear-Pads Cushions For Bose QuietComfort-35 (QC-35) & QC-35 II Over-Ear Headphones
28 Review
Replacement Ear-Pads Cushions For Bose QuietComfort 35 (QC35) And QuietComfort 35 II (QC35 II) Over-Ear Headphones - Midnight Blue
27 Review