Dave,
They are NTE Round Hole Illuminated Rocker, Square Bezel switches. LEDs come in red (54-645), amber (54-645A), green (54-645G) and blue (54-645B). They run $3.50 to just under $5 each. I get mine from arcade-electronics.com for about $3.50 each although the big stores carry them too. I like to support the little shops...
Spec sheet attached.
These switches are rated 20A at 12VDC!
I am using a dimmer as they can get pretty bright and if you plan on any night flying they might be a bit much. The dimmer I found that works with these lights is from Oznium.com.
https://www.oznium.com/led-dimmer-knob
Regards
Jeff