Originally Posted by illuminum

I'm loving the responses so far.

Here's a website that sells the train horn kits. http://www.hornblasters.com/video.php

There are less expensive kits sold on ebay which use replica horns instead of actual train horns, which is what I'm going to install.

I was thinking of removing the winshield wiper fluid tank and replacing it with a smaller one, and mounting the horn there somehow. That's one option I've come up with so far.