Being the cheap a__ that I am, I gutted my old radio, installed a modern radio inside it and put the speaker grille on a hinge. Origional dial there and lights up, knobs there and buttons there. Almost can't tell the difference. If you pull the top of the speaker grille it hinges foward showing a modern radio. I already had the new radio and speakers so the whole project cost me about 30.00 and some time.
I have a friend that bought a 8 track that mounts under the dash at a swap meet for 5.00 and did basically the same thing. Mounts nicely under the dash of his 60 Cad. Looks like it belongs there too.