-- Last Updated: Jan-16-13 9:30 PM EST --
I have never seen them either, but I like the idea of having a removable pin to keep them upright or laying flat. I have Thule Hullavator pros and I think the weakest link in their system is the lock on the swivel. At full price they list they do seem a little cheap for stainless steel tube.
Foam is easily replaced by closed cell pipe insulation and covered with dragon skin.
Somebody has to be the guinea pig..............
Pull-Up Strap Handle Kit