I have a (coming up to) 10 yo Tiamat 7.1 Headset and the RH ear cup/ whole RH side has started coming away from the headband.

I can see a crack in the plastic facing that helps to hold it all in, and wondered if there was anyway I could get a replacement or repair done on it (UK)
Everything else about the headset works flawlessly, as it has done for the whole time I have used it, and I am loathe to throw it out or replace it if it is possible to repair/ fix

Suggestions or help greatly appreciated