In reply to David Coley:
I always make my own out of ice cream carton plastic or those flexible chopping board sheets. Seem to last about twenty routes. Cut to shape, punch holes, tie with tiwraps or fusewire.
Or try just duct tape if you can't be bothered.
There are some "universal" ones around too. I'm not convinced they're essential if you're experienced and have flat framed crampons .
Post edited at 17:11