BigNed you can make one yourself with a wheel collar. Try and find one that has two grubs or just tap another hole opposite the one present. Then just put two screws in, one on each side to hold the rubber bands. Modelmotors has one now for the axi motors as well. I'm using it on my shocky. It doesn't help the prop all that much when you dork on a hard surface because the prop scratches anyways but i'm sure it helps so that it doesn't shatter. On grass of course it helps alot! It will always save the prop and the nose of the plane. You know so that the firewall doesn't break out of anything funny that could cause more damage.