[Milsurplus] Connector source

[Glenn Little WB4UIV]

I have some TRW Microwave detectors that have a SMA connector on one 
end and what looks like, but is not, a reverse SMA connector on the other end.
I have located one connector that will fit the non SMA side.
The markings on the connector are GREMAR 6488.
Google found nothing useful.
Any ideas as to where I can locate some compatible connectors?

Thanks
73
Glenn