Call Jericho at 1800-call-tuf. These guy's use to be a UFO Plast dealer. I called them and UFO doesn't make them any more but Jericho said he has a ton of these side panels from mid to late 80's but none of them are marked. He said he could take some photo's of the part and let you check them out. He also said they torn down a bunch of mid to late 80's kx's and he still has new parts lying in their stock.