Where can I go to purchase more of these? Specifically color ones like red.
Bryan and Susan carry a wide variety of wedge-base LEDs for pushbuttons at Paradise Arcade Shop.
12v Red LED -
https://paradisearcadeshop.com/home/electrical/leds/button-leds/519_red-12-volt-ledThese 12v LEDs also work with 5v -- they are very slightly dimmer, draw less current, and last longer when you run them that way.
The LED/button combo to watch out for is a yellow LED in a yellow button. The result looks like muddy orange.
Use a white LED instead
or get both and see for yourself since LEDs are so inexpensive.
Scott