What are the chances of finding a relay for my old Royce 23 channel radio. The relay has no numbers on it just a brand, Tech. I looked on CB tricks and it just shows in the service manual the Royce part number. I was going to take it apart but it is sealed up and does not appear to come apart. Coil checks good but it will not pull in. Looks like a dpdt with a 320 ohm coil.