Using QTek 9100. Love it. Would prefer to use wired QuietSpot Boom Headset by Shure. Problem: 9100 appears wired for their own Stereo Headset/Mic that has a plug with 4 conductors whereas most, if not all wired headset connectors have 3 conductors. Ear peice works find. Mic is inop. Any known in-line conversion hardware?