Anyone replace there 1290 horn ?

Brand new bike, not even 200 miles on it and as soon as the bike gets hot running around town the horn craps out. Not totally but all I get is a small muffled bleep, let the bike sit and cool off the horn works again until the bike gets hot again running around town. Any suggestions for a replacement horn ?

I might install a Stebel like the one I did on my multistrada. Much louder. You'll just have to rig up a custom bracket but that shouldn't be too difficult on a naked bike.