Xbox One Stereo Headset, model number B00IAVDQCK. Released March 2014, compatible with the Microsoft Xbox One. Headset includes over-the-ear fabric ear cups, unidirectional boom microphone, and detachable headset adapter with volume and mic controls.
@unique1 it looks like those parts are not individually available. I would suggest you purchase a broken headset from places like ebay and use parts from that for your repair.