Finally after 30 years I've found a clean and un-modified 80's - 4th Gen Honda Civic which I wanted very much back then but couldn't afford it. Having to own this car alone would not complete without a vintage player to go with it. And this is what I found, a classic Sansui cassette player with preset FM station and built in amp.
I had to check which the 4th Gen Civic was. Even then there were various body styles. Here in the U.K. we also got the Saloon version made here and badged as Rover https://classics.honestjohn.co.uk/reviews/rover/213216/ There aren't many left at all here though https://www.howmanyleft.co.uk/vehicle/rover_213_se The same with the early Civics https://www.howmanyleft.co.uk/vehicle/honda_civic_crx I guess someone had taken out the original stereo. What speakers are you using ?
https://honda-tech.com/forums/honda-acura-28/1989-1991-canadian-civic-ef-brochures-pics-2760498/ The original player from Honda no longer retain by the owner ..in fact many of these civic already ended up in the junk yard but I was lucky to take possession of this car as a 2nd owner..
My buddy had a Prelude from around then, one of the last cars where you could stack a vintage audio system. His Honda Stereo got stolen so he replaced it with some really nice stuff, those were fun cars to drive.