I'm pretty sure they're the originators of that type of material...although I've never seen or used the stuff.
ND sells it.... ask them how much it is lol.
For our dirtbike, snowboard, ski, sxs, sled, atv graphics all we use is the Convex. Love it.
It's pricy but I do get a pretty good deal on the stuff if someone needs some. However, in Canada I'm probably still paying more than you USA folk!
6mil print stock with the 12mil Pro Shield. It stands up great.