I've got one... for sale. But too small for the REV.
I'd be more than happy to discuss.
Cheap, works well, easy to install(compared to hydrohoist).
Doesn't tear easily. Is transportable. Will work off 12volt.
Stable, you can walk on it. Distributes weight of boat evenly, just as if it were in water, unlike other systems w/ bunks.
Can work for stepped hulls w/o any mods.