My guess is it's this one... http://x-h2o.com/index.php?threads/not-mine-polaris-octane-joke.150055/
Are you in Wisconsin? I've seen the ski in person. It's a piece of poop that all the good parts were taken off of it and it was slapped back together with anything that would fit. The turf looks terrible, etc. No padding in the top of footholds, etc. I think there's a kawasaki gas tank in it haha. No offense to the people involved in selling it since i know both of them, but I'm just watching out for another xh2oer. Not worth it..