I know they have to be somewhere, but where do the horn rebuilders get the internal parts to rebuild a horn , the diaphragm and coil? MMMMM Every parts counter guy I asked gave me a real strange look before he said I don't know
John

Paragon repoductions, 1 800 8824688, has the metal diaphrams and the unique fastners to reassemble the horns. doubt they have the coils but you should be able to get good coils at the jkunkyard. i'm assuming your pass car chevy uses the clam-shell horn like the mid-year vettes do. good luck, mike