UPDATE:

Okay, I've been in contact with the manufacturer about quantity pricing. I still don't have the final numbers, but that should be resolved over the next day or so...

The problem is that I'm dealing *directly* with the manufacturer, and "quantity" to them means on the order of 1,000 or more. But they're willing to work with me, so here's what I'm thinking.

What about an initial run/order of 100 or so of the red-lighted switches like the one I've shown here? That seems to be the most popular, and most factory-looking switch?

Failing that, I also asked about getting a version of the switch that allows for interchangeable light colors and symbols.

I'll keep y'all posted!