Andy I've never one in person yet, but all the pics I've seen the polyps are fuller like little balloons, but it could be with the polyps just deflated. I don't know if he is on these boards, but I would reach out to Tony Vargas because I believe he saw and took pics of the real deal one. I know he is on RC. We met him a couple of years ago at a LIRA meeting as well as at NERAC.
I don't think so Andy. The only real "Bounce Mushroom" is from wwc. People will try to call any mushroom that has bubbles on it a bounce just to try to sell it for hundreds.
Here's the real wwc bounce http://blog.aquanerd.com/2014/07/wwc-bounce-mushroom.html