Availability of headbands (not the cushions) is more difficult than it was recently with many vendors only selling restricted parts for the HD580/600/650 line.The other problem I mentioned earlier is that my brother (or his son) handled the cans a bit roughly snd chipped up the plastic headband a bit on the 580s. Is there a fix for this or can any of you point me in the right direction for a replacement. I’ve searched the web with virtually no luck. Thanks!
A HD650 headband is part No. 549347.
A HD600 headband is part No. 586411 (Avantgarde) although this is the speckled one rather than matt grey.
Alternatively you could try here:
https://www.shapeways.com/product/9QKXAU59F/sennheiser-replacement-headband