Many other GM Horns should be close if not the same. Are you looking for a single or the dual horns?

I'm sure some one with more experience on them will chime in soon. But most GM's such as Camaro's, Chevy Nova, Olds Omega, Pontiac Ventura, Buick Apollo (I believe?) should have basically the same horns.

I'll see if I can find any more info?

Good luck - Brett - 67 Drop Top 455!