Did you find a way to get a replacement ? This almost happened to my headphones as well. The plastic is defective and pioneer should help.
HDJ X5 Broken Hanger
I have my HDJ-X5 left hanger/holder broken. I've seen as
Pioneer 301400001222 or HDJ-2000 WNH1012 part number.
Is there any chance of getting a replacement?
Thank You very much