trying to find smoked color plastic

Does anyone know where I can buy a sheet of smoked plastic similar to what Darkstorm uses for faceplates. I want to cut some simples rectangles but can't find a place to purchase. (I lost Darkstorm's email so I can't ask him)

Here in California Tap Plastics has a significant selection of plastics. Check out their web page and catalog. www.tapplastics.com I think you are located in NY so unfortunately there aren't any stores located in your area.
--Andrew