I got my green Plexi sheets from "Sloan's Woodshop" in Tennesee. This link should take you directly to their Acrylic (plexi) Sheets page. I suggest if you are wanting Transparent colors (and green) go with Stock #913. They also have "solid" colors of Plexi. I used this on my AMD Logo I cut into the side of my rig. It looks great and when lit up with my 8 inch industrial white cathode the insides glow a nice AMD GREEN!