Rob I know I saw you looking for the vinyl that MC uses somewhere on here, or maybe it was the backing material.. regardless, one of the stickers that came on the box with my skins was from Spradling International. I checked them out and it looks like they are the ones supplying the carbon weave material, fwiw.
Also I stretched on the sundeck skin (from MC) and it turned out great. I may have even stretched it a bit much, but I figure in the heat, it will loosen up a bit. Can't wait to get the rest of em!