Bill,
I wouldn't worry too much about finding missing parts if you should take this on, they have a way of turning up. For instance, Mike @ 281 347 4043 (TX) has a boom and all the rigging and about 8 sails for this boat,sorry, can't remember the price , but it's cheap, he had the mast, but he sawed it into pieces so he could haul it to the scrape metal yard. Of course that was after he sawed the hull up and hauled it to the landfill.:(
I agree the missing parts may very well be at the marina. GOOD LUCK!!