Amazon.com: AirMod Wireless Bluetooth Adapter for Bose QuietComfort 15 Headphones (QC15) : Electronics
Amazon.com: Saipomor QC45 Adapter Airplane Audio Stereo Jack Plugs for QuietComfort 2 QC3 QC15 QC25 QC35II QC35 SoundLink SoundLinkII AE2 AE2i AE2W and More Headset with 3.5mm Golden Plated Jack Plugs :
HeadponeMate Wireless Bluetooth 5.0 Adapter for Bose® QC® 25 Headphones | eBay