Hi Jon

I make my own cables using picture cable or any small cable I can find from the hardware store, I make the ends using copper or aluminum (aluminum is easier) tubing cut in half with a dremel tool. I lay the cable in the channel then bend the loop and tighten it up around the cable with flat nose pliers, a larger piece of tubing to slide the ends of the cable into and glue with JB weld or epoxy

Gary