Line-o-Lite "select drink" and "correct change" lights

[Tandemdad]

I need to replace the line-o-lite "select drink" and "correct change" lights on my Cavalier CSS-8-64. The part number is 3510A20. Where can I purchase these lights?

Also, do they pop in and out of the metal holder? If so, what is the trick for popping them out easily? So far, the easy part is escaping me. Thanks.