As a commuter I use the m 50 a lot and am fed up with people texting and drifting in on top of me. I’m looking to get a good horn something that gives a good loud BIP. Enough to wake someone from there techno slumber.

I bought a old style ‘Aroooga’ model T type horn but I have no space and its not as deafening as advertised.

Any suggestions? Maybe a shell from and old merc or something? Just enough to frighten a pedestrian ot wake a techno.drifter