There was a fellow that used to be active here - Dan Berger. He had his own version of a beach cat graveyard at his house - hulls, masts, crossbeams, you name it. For a variety of boats as well. I boat a Hobie-18 platform from him after mine got t-boned and a I couldn't find a suitable single hull. Very good price and great person to visit. Anybody heard from him lately?

From all this, I would find it hard to recommend anything other than a used Hobie-18 magnum, or SX if you can get a deal.