Yes mate, I explored that option and AFAIR last year it was $215 for Go to rebuild the single CD version.
I ended up buying a Pioneer with bluetooth, Ipad/pod control , USB, CD with ability for compression, Pandora ( if you have a BIG download allowance), and probably some things I have forgotten for $180.
I am not concerned with originality with mine and I think it looks great.

Oh , one thing on the window antenna. A Caravan park manager broke my rear right window with his whippersnipper , and replaced it. I found the radio signal became better, and I think it was from the new contact button for the antenna.
They have a "press stud" on the window that the antenna wire clicks onto, and I think they must get oxidised over time. Maybe a quick pull off and clean up will help.
Regards Philip A