Andrew,
Some time ago I spoke to this chap about Wayfarer repairs as his details were given to me from my own inquiry. I remember that he was very easy to chat to and gave me a couple of tips, so could be a good starting point…Steve Townsend 01189 833638..and use quality marine ply from Robbins Timber…get the best quality that you can afford. My W3366 is a Moores composite too. Steve repairs Wayfarers as well as other makes.