I looked online at car horns. They are relatively cheap and easy to install. I may get some for my Kia Sorrento. It has quite the wimpy horn.
I reached back to this post from 'Neal', about an Air Horn, to post the Cheapest price I've found on a horn.
As my Sorento also has a wimpie sound, like a Very Weak 'Road Runner' beep-beep. No body is going to take me serious with that.
Found this on Ebay, 19.99$ with free shipping from California. I'll order one, mount it, and give some feed back.
Here is the seller, can't find the ebay number,
http://www.ebay.com/usr/hiparts?_trksid=p2047675.l2559 or mabe I did. And NO I'm not the seller.
12V SUPER-LOUD AIR HORN Powerful dual horns blare out a warning that can't be
ignored. Comes complete with a 12V compressor, relay, tubing, and mounting
hardware. Easy installation, Weather-resistant PVC and galvanized metal, Super-
loud 118 dB
Powerful dual horns blare out a warning that cannot be ignored.
Easy installation
Super-loud 118 db
Compressor size 11.3cm length ,4.7cm upper diameter
Trumpet Size
(Long Horn) 21.7cm length ,7.7cm Round diameter
(Short Horn) 16.6cm length,7cm Round diameter
Hose 50cm length