My 77 has the Rallye steering wheel, and the horn button no longer works. I pulled the button apart, and it has this style of switch inside it (which appears to be broken): I have been unable to find or identify a replacement for this. It looks like Scout Parts has one NOS item for $122, but I a) won't deal with them and b) am unenthusiastic about paying that kind of price tag. Is there Doorman part, or some other manufacturer that is readily available? Any Chevy\Saginaw crossover parts?