We had an auction car that someone installed Eldorado horns on. They are now in my tool box
. They are large trumpets, but they might fit under the bike down by the starter. They might not be as loud as your guy's horns, but at least they don't go bleep burp. I can see a horn contest coming.
I also have a set of old Fiams. These babys have five (Yes , five) metal trumpets ranging from about 9 inches to 2 feet long. The compressor needs to be repaired, I can get it to work intermittantly. It sucks a lot of juice. I haven't figured out what tune it plays because I haven't been able to figure out the proper combination of the hoses to the trumpets. It might play "Dixie". I do know, that if you take the largest trumpet, and shoot compressed air through it it causes severe ear pain and you don't do that again.
.
Doctor: When does it hurt?
Tomo: When I move this...
Doctor: Then don't move that...
Tomo: But that's my wallet...
Doctor: Pay the nurse...
Tomo: Crap...
Doctor: Maybe next time..
Wife: The doctor called..
Tomo: What'd he say?
Wife: He said you're gonna die..
Tomo: What?!
Wife: He just don't know when...