Noticed Aldi don't hold in-store much stock of the various cycling accessories I've mentioned. Their copy is much cheaper than the Hornit 140db, but I have no idea if it's anywhere nearly as good.
hornit.com
dB140 | The World's Loudest Bike Horn | Hornit
The upgraded dB140 is the loudest bicycle horn on the market, putting you in control of your safety by letting people know you’re there. It’s small, sleek and enables you to alert distracted drivers and pedestrians to your presence.
hornit.com
