If found a simple , easy and cheap way to get a better horn and make it look right.
On my road Glide I bought an after market louder car horn
using the two thin brakets that come with it I Douabled them up removed the front fuel tank mounting bolt put the bolt throught the bracket and reinstalled with the horn. Horn in mount facing down to keep dirt and water out as instructed. It clears the forks and fuel tank and can not be seen unless you get in and look for it. Add 6 inches of wire to to reach the new horn done. 20 minutes horn is loud and out of site. cost 15 dollars.
it worked so well I am going to put one on the right side also.
top view

side view looking under faring
