dave there is a couple of ways to get around your dilemma. first you can find a company that will take your radio and put all new workings inside and give you the inputs for cd/mp3 player. from what i heard it costs about $400.
this second one is what i did. there is a company called secret audio. they give you a unit about the size of a desktop computer hard drive, that you can mount somewhere like under a seat. they give you a small display that you can stick on your dash to change stations. plus they have a cd changer that you can add. basically you are wiring in another stereo but you can leave the original in the dash for cosmetics. i bought one for my 75 but have yet to install it.
hope this might help you.

just checked the box. the company name is custom autosound radioes.
eddie208902010-03-30 18:56:43

There are several places that will rebuild your system reasonably - I've had speakers rebuilt and they sounded great - cheaper than new units. There's a place about an hour north of me that does Eckler's work if your interested and I can still find their card.

 

No highs, no lows, it must be Bose. Bose blows!.

Dave, I found a place called..Car Stero Help...in Florida ( www.carsterohelp.com ) that seems to have all the Bose parts and repair services. I am planning on sending my 89's Bose radio and all the speaker/amp enclosures to them when I get around to it (currently doing engine/trans first), you may want to try them.