I have several Motorola MT351r's and MS350r's that we use for various outdoor activities. The rubber antenna's on a few have broken. Otherwise the radios are fine. I've tried everything I can find to glue them back together, but it only holds for a little while. Is there anywhere to find the replacement antenna rubber sheaths ? I'd even be happy just finding a few junk radios for parts as long as the antennas were good.