Andrew, he's not looking for the conversion, rather to get the original going again.
Look in Hemmings Motor News as there are people out there that repair the original radios. Here's a place that is in the family of a VMFer,
Home
Sometimes you just have to carefully take them apart and clean them. You will need tuner cleaner from Radio Shack. I have an original 68 AM/FM stereo radio from a Mustang I was given that I took apart and cleaned up and got it working again. I would put it in my car but the dial lens is cracked and missing a piece, the reason it was just given to me plus being in the right place at the right time. It's NOT for sale!!! I'm keeping it for a future project car and watch Ebay to hopefully find another dial lens for it.
__________________
1968 Mustang coupe, Acapulco Blue, 289 2v, C-4, Power Steering.
Hopefully a 1969 convertible or Sportsroof (non Mach or Boss) for next Mustang project
Trying to find my father's 1973 Mustang Grande he bought brand new. 3F04F126773 last known registration and title was in New Jersey, 1982.