That Capture Integration sells and others seem to use...is there any particular thing to look for when trying to make one yourself? I would just buy one from them, but since I am in Iceland it would take forever to get here, and probably would not be worth the shipping, tax and custom issues. I would just like to go to a home improvement store and buy a bit of acrylic or plastic if I can find one...it needs to be the correct shade though, right? Is there any way to determine? Is there a particular name or type that one should buy?