I can send you a new Amphenol 82-63-RFX. Although made for RG-8, 213, etc., the poop sheet shows it will work with 216 which is 75 ohm. If you want to try replacing the entire connector or just see it the center conductor will work, send me an address and I will stuff it in an envelope and toss it at the pony express lady when she goes bobbin by.