You can get parts from David Clark, or from some pilot supply stores. All you need is the cord. Changing the cord is not rocket science, if you have some mechanical dexterity and a little electrical knowledge. The wires should be held inside with screws, so no soldering is required. You just have to get the old cord out and thread the new one in. Using a drop of liquid soap helps get it through the strain relief. I've done this several times, having built my own headsets for years. It's easier with the DC headsets than with those I build from scratch using DC hearing protectors.