I'm wanting a RJ45 to RJ45 repeater controller cable for the QYT KT-8900D pre-made. I don't want to make one. I want to buy one. I make antennas, not rj45 cables. Surecom offers an RJ45 to 3.5mm speaker mic cable, but I want to pair two mobiles, not a mobile to HT for crossband use.