RHuddle56,
I had a 1954 truck radio repaired and converted to have an FM tuner. All original parts were repaired and the new FM tuner was added - it is so small that it is placed inside the original box. $400 for repair of the 6v original radio plus addition of 6v FM tuner. Norman's Class Auto Radio, 727-546-1788. It was returned quickly and works fine.
He is listed in
Hemmings Motor News Shop around for price and warranty - they all use the same solid-state FM circuit board. Be sure to be specific about what cosmetic repairs you expect (dial glass, trim plate, cardboard cover, foam front seal, etc).
Tim