The faceplate of the Telefunken is where the magic is, and it's not all that special. I'd think you could just make something (laser-cut stainless?) that would accept a single DIN head with knobs (like a retrosound) in the traditional place, then cover the top (speaker) area with speaker fabric. If you made that panel removable, you could integrate a phone mount behind it, and just use your smarty-pants phone as your Car-play display (after removing the speaker fabric panel).
... but you do you. I'm interested to see what you come up with.
