Clay;
Those are kinown as "indicators" among other names. Google one of these electronic distributors: Digi-Key or Mouser. Then search their website for panel indicators. You'll find a large choice of sizes, colors, operating voltages, etc. For Bonneville, a sealed indicator would be less prone to problems caused by salt.
On the surplus market you can sometimes find mil/aerospace "indicator switches"; these are pushbutton switches with a built-in light. High current switches are most likely going to be toggle switches.
Avoid ones rated only for AC use-- their contacts are not as heavy as ones rated for DC, current rating being equal. AC service erodes both contacts but not very quickly since breaking the AC current erodes one contact and deposits metal on the other. AC operation averages out to little net metal erosion on the contacts. DC contacts, on the other hand, always break a current flowing in the same direction, hence there is more contact erosion. Manufacturers usually tailor the contact alloys as well for AC or DC service.
Regards, Neil Tucson, AZ