[MRCA] Need military connector, 4 pin

[TChirhart]

Hope someone can help me out as I've been searching for over a year for
a set of connectors. I have a SSB converter similar to the CV-591 that
is missing the power connector. I believe it was a 4 pin, 1 inch square
that mounts on the unit and the matching power cord. Is there anyone out
there in military radio land that has one? I have a plug but not a
socket. I do have a 3 pin version of the socket but no plug. Thanks 73
Tom K4NCG