That's the RAW one he mentioned initially Jon. I have to say, I have one of those and it is a cracking bit of kit.
Some people have made their own using SATNAV mounts and all sorts of other things.
I know that the RAW isn't cheap, but it is really well made and lovely to use. Projected price for the Rowan hamster according to info on a thread on here was around £280, so a lot more than the RAW as well.