After having to reinstall my repaired radio, I discovered that my 12 V receptacle was very fragile.  Like a lot of stuff made nowadays, it's meant to be sold but not used. Up till then, the mounting seemed to be sturdy enough for normal use.

I noticed, while looking for a replacement 12 V receptacle, that very few have mounting options.  Most expect you to leave it loose in your car and some offer some 2-sided tape to stick it to a flat surface.  None appear to have an option to permanently mount your 12 V outlets neatly

Installed 12V outlet from right

 

My old twin-shaft AM radio is removed and replaced from behind the dashboard and this area is already a bit congested with my aftermarket instrumentation and 12 V receptacle.  While maneuvering it back into position, I inadvertently put a bit too much pressure on the receptacle and caused one of the receptacle's shoe receiver guides to break off.

My first attempt at repair was to use modeling cement to glue the broken piece back onto the receptacle's body.  Modeling cement contains solvents that "weld" the polystyrene and ABS plastic parts of a model together, which I thought would be my best option.  Unfortunately, the receptacle was not made of either polystyrene or ABS plastic because the glue did not hold in the slightest and peeled away from the surface.  At least that made it easy to clean up for the epoxy.

Broken Receptacle