While motor sailing south from Puerto Vallarta to Bahia Chamela, Mexico, and about 5 nm out of Chamela, we apparently hit an underwater obstruction and lost our rudder. We were in 25-35 knots of wind and 8-10 foot seas, about 2 nm off shore. Fortunately a big power boat took us in tow and got us safely to anchor in Chamela. There are no facilities here for boat work, but I think we can put in a replacemet rudder while in the water. Problem is, finding another rudder! Do any of you know where I might find one? I will contact Hunter directly to see if they have one or can either make one for me or can supply shop drawings so I can have one made.By the way, my boat is the 1982 model H37Cutter.Thanks for any suggestions. -Chuck-