[Milsurplus] Looking for 3 pin plug that fits on BT07C 8-3P

[Dongen, Nico van]

I'm looking for a 3 pin plug that is used in a DC power lead. I think I have seen these plugs also used as an audio plug.
Found one in my junkbox but the keying is wrong. The number on the male chassis plug is Burndy BT07C 8-3P
I would also be helped with a pair of a chassis socket with its 3 pin plug in the same style as the old one.
Replacing the chassis socket can quit easily be done.
The chassis socket is secured with a nut and not with the common 4 screws.

Any help much appreciated

Nico - PA3ESA