It seems to me that you can light these modules are green or red, but the green is a 'yellow/green' meaning that you couldn't get a full red-yellow-green.
Going to a somewhat higher price, digikey sells red, yellow, and green modules. parts 67-1589-ND, 67-1575-ND, 67-1582-ND at
Digkey. I'm sure similar can be had surplus elsewhere.
-Jon