Under dash 8 track
Life on Mars ? LOL
The daughter said "I have 2000 songs on my mp3 player."
The dad replyed, "That many 8 tracks would have filled up the bed of my Elcamino." If my ride sported a vintage 8 track player I would have to have some collectible tapes too, or atleast clones of them. There was A Darkside Of The Moon release in a pink case, a Deep Purple Machine head in purple. Those are just 2 I recall. I'm sure research would suggest other titles.
Now... since 8 track technology was crap and the tape cases couldn't handle sunlight, Why not clone some classic tape cases that have no tape in them ? I'd even seal them where nothing could get in the case. I wouldn't want a coin transfered from case to player by the unknowing hands.