Knowing that you have a (nearly) ancient Acura I wanted to let you know that I found an old (same era) radio for it. It's yours for shipping if you have a need.
I cannot use it in anything as even then you needed a code etc. IIRC, this came out of an '81 Civic sedan that I sent to the happy hunting ground a year or so ago.
JT
(Trying to clear all the old excess crap)