Hi Matt,
I believe those are Mountain switches. You might want to consider buying them from Mouser.com. Located in Texas. Not sure who would be the cheapest.
Mouser does have downloadable .pdf data files for all their hardware.
I used that switch a lone time ago in an Airbus FCU. From memory, the LED illuminates when the switch is in the ON position. There were four wires on the back. Two for the switch and two for the LED power.
I'll look and see if I can provide you a link to the switch at Mouser.
Link to the switch:
http://www.mouser.com/ProductDetail/...DrL07hEox44%3d
Link to the .pdf:
http://www.mouser.com/catalog/specsheets/MS-100226.pdf
Please do some research on these switches. They are for printed circuit board mounting. When I used them, I had to glue them into the plexiglass panel. Not the best application but it did seem to work.
Here is a link to an LED tutorial.
http://www.theledlight.com/ledcircuits.html
Using a resistor is very important with LEDs. It limits the current flow. Not using a resistor will burn out the LED the first time you apply power. Sometimes the interface board designer will include the resistor in the board so an additional resistor will not be needed.