Found a Good DIY Solution to a Worn Out Headband Cushion : r/headphones
Replacement DIY Headband Cover Cushion For Bose QC35 QC25 Headphones Parts | eBay
Replacement Headband Cushion Top Head Band Pads For Headphone Metal For 80-105mm Speaker Shell Ear Cups Repair DIY Part Beam - AliExpress
Amazon.com: ASIILOVI Bluetooth Speakers Module, Bluetooth Pillow Speaker with Mic, DIY Bluetooth Headset, Bluetooth V5.0 Replacement Module for Sleep Headphones, Bluetooth Beanie, Bluetooth Headband : Electronics
My DIY electrostatic headphones | Page 211 | Headphone Reviews and Discussion - Head-Fi.org
Artificial Leather Headband for Grado Headphones with Metal Brackets – Earphone DIY Labs