The Land Shark system looks even better, and for $60 is probably as good as you can get, short of an "Enviro" suit.
Is this the "Land Shark?"
http://www.land-shark.com/I had never heard of this before, so I did a quick google. If this is indeed the right item, they are having a sale right now -- down to $40 from the regular $70. Seems like a neat item.