First entry on Google with the keyword "Koolshade" : http://www.koolshade.eu/index.php/en/ This is the official Koolshade website, hope that helps.
Oh. I thought that link was to the manufacturer's website, as in, "Hey, we'll sell you bulk orders for commercial use. Oh, you want just a couple of yards? **** off."
What I was hoping for was more info on where to find some in a "hobbyist" amount Searching the forums turns up threads half a decade old.