I did a thing - Koss KSC75 + Yaxi Pads + Headband : r/headphones
Koss KSC75's. Dont Forget This Giant Killer in all the ''Hidden Gem'' Hype. | Page 88 | Headphone Reviews and Discussion - Head-Fi.org
Koss KSC75 Compatible Headband (Parts Express)
Headband Head Pad Top Cushion For KOSS Porta Pro PP KSC35 KSC75 KSC55 Headphones | eBay
Replacement Speaker Part For Koss KSC75 4.4mm 2.5mm Balanced Cable 3.5 Headphone | eBay
Modded Koss ksc75 (mmcx mod, 3D printed headband and grills, yaxi headpads, effect audio cable) : r/headphonemods
Amazon.com: Voarmaks Light Version Headband Head Pad Top Foam Cushion Ear Pads Compatible with Koss Porta Pro PP KSC35 KSC75 KSC55 Headphones Portable Featherweight HeadBeam : Electronics
Top Band Headband Beam Ear Pads Cushion For KOSS Porta Pro PP KSC35 KSC75 KSC55 | eBay