thats the lame thing, the guy invented it while working at University of New Mexico. So the University owns the patent rights in the US. He has sold the rights in the UK to some company so you can buy them in the UK, but not here.
Though I think it looks very basic. I'm going to attempt to just use some webbing (utilizing stuff i normally have while skiing) or some accessory cord and fancy a traction splint from it.
The only unique thing he has done is hollowed out the hole of the handle and has made a pulley system out of it for relocating shoulders. There is a .avi video of this on the site.
Anyhow, i'm gonna try it out and will post pictures of my findings.