Power inlet/outlet housing, M1079 van enclosure

[Oxyacetylene]

I'm looking for one of the big round connector shells for the power outlet on an M1079 van enclosure. I don't need the connector "innards". I plan to mount the empty housing in between the two factory ports and use it for a temporary passthrough for coax, power, etc when I am doing radio stuff out of the truck. In the pic here, you can see the M1079 has an inlet and an outlet. Ideally I'd like another outlet, which is the one on the left with just a screw on cap.