The other day my wife came flying into the driveway of my work (firehouse) with the horn blaring at 7:00 in the morning. Fortunately I only work a half mile from home, but after my crew stopped laughing, I found the horn button on the steering wheel is bad. The foam between the two copper plates is deteriorated enough so it won't isolate anymore. Does anyone know where I can find a replacement, other than a used part? Thanks, Don.