It's always good to check with Bose for repair and replace options. BOSE customer support line: 1 (800) 379-2073
I can also help with many issues. Feel free to send me an email if you would like service or have any questions.
I can help replace cushions and cables or you can do it yourself. I've provided links to some common parts available.
Click links for instructions and to purchase parts
Cables and Cushions
QC - 35 - White
A20 - Aviation
I have chosen these links to parts and videos after reviewing all the options and these are my recommendations. I do receive a small commission when you purchase using my links and this supports providing info and guidance to you. Thank you for using my links