Push firmly on the inside of both hulls. They should flex a little. If you hear a cracking noise, you should keep on looking. Also, check the decks in front of the pylons...same here, push on them, and if they look like they have a big wave--not flat, they are delaminating... Most of the other stuff (sails, hardware, tramp...etc.) can be repaired or replaced...may cost a small fortune.
Catsailor has a classified, and this link are good places to look:
http://www.catsail.com/classified.shtml