Guys, I found the switch:
It's a 9001-TR14 Heavy-Duty oil-tight control unit from a company called Square D which is no longer in business. They were bought out by Schneider Electric at some point and the current line has nothing comparable unfortunately. I just happened across mine on ebay, the seller had a bunch though so jump on it while you can.
There are a number of other TR models but most have either a partial or full safety flange around the button that would prevent you from slamming down on it:
As you can see they have removeable colored lenses. There's no electrical connection at all, it's just a spring loaded pushbutton. Now to find a suitable base...