I have a set of Rivco air horns which I love. They look great, are very loud, but I can't seem to keep them working 100%. My question is, if I replace them, are there any "all electric" horns (no mini air compressor needed) that are EXTRA loud (the louder, the better) and that either look good, or (if ugly) can be easily installed and "hidden" underneath the plastic (or wherever)?