[TMC] Mating 2-Pin Male Muting Relay Connector for GPR-90

[triodes at optonline.net]

I am finally properly integrating my GPR-90 into the shack, where it 
will be used in conjunction with my GPT-750 and SBK-1K clone 
transmitters.
I am looking for the 2-pin non-polarized male plug that plugs into the 
female chassis-mounted connector marked "Relay", located on the rear 
apron of the GPR-90 receiver.
I believe this was a standard 1950s-era connector made by Cinch, but I 
cannot find any vendor part number information, etc., for it.
Does anyone have a spare they can sell to me? I want to use the correct 
physical interface between my external muting relay and the GPR-90, 
without any kind of hammy hambone kludge here.
Any help here would be very much appreciated!
Thanks & 73,
Bruce, W2XR