Da BeemanNeed recommendations to have the factory AM/FM Power Antenna (non- CB) rebuilt for a ’78 Pace Car.
Norsky
A browser search of the world wide web for audio/radio unit repair outfits should yield some possibilities. I would also hazard a guess that one of the Corvette parts outfits would have replacement units in their inventory.
Jim Olson 
"The Toys"...!!! Save the Wave! 
NorskyThank you. Yes, most suppliers offer a replacement. However, these are not an OEM antenna and vary few repair/ rebuilders want to take on this specific antenna. Have found only one willing but they do not have parts right now. If you know of someone who might have one (working or not) a salvage yard with a wreck that has it or a a rebuilder please let me know. Again, thank you but only an OEM replacement or rebuild will work.
Sounds like you've done a fair amount of research already. There are several other members who have the same car as you do so hopefully one (or more) of them will chime in with some help.
Jim Olson "The Toys"...!!! Save the Wave!
