I called too at Apple. They only do one to one exchange. They don't do any servicing. The price is just near new retail price. Mine is still working fine, only need to change the head band as its already worn out over last 3 years. No such firm doing such head phone repairs??? Saw a you tube video on how to dismantle Dr Dre Pro but the procedure is very complicated with soldering involved and the wiring, parts, components need to take out and put back are too technical. Any wrong step will spoil the whole set. So trying to find a place willing to change the head band. Don't mind paying for workmanship and parts. Rather than paying for a brand new one that will set me back another over 400 sgd.
Once in a while I fix headphones. For units with noise cancelling functions, there are at least 10 wires to be soldered. 5-6 wires travel inside the headband. The trick is to write down or take a picture of the connection so you can reconnect them correctly