You could buy a strip of white and a strip of black (acrylic) and the solvent "glue" used for that stuff, and laminate the part yourself.
basically, you run a stream of the solvent down the middle so that it flows outward as you lower the top layer on the bottom later. The goal is to avoid air pockets. The excess will run off of the edges, so you'd have to have it elevated to allow drip, or keep the paper on the back. Back wouldn't show anyway. Weight it with some books or something.
The solvent actually remelts the surface, allowing the bond. It evaporates quickly, but between layers it can remain soft for a while. Let it sit for a couple of days to be safe.
Don't make the same stereo holes. LOL. You can't get post mount anymore. It's all DIN these days.
Alternatively, you might be able to solvent glue the break, and buff the plastic of the original part.