I picked up a C&C 30 MK1 project boat a couple of years ago, with no main. I live half an hour from Bacon and checked regularly with them. They have hundreds of sails on their website, but also have a hundred or so awaiting inspection and classification, but only get through 1 or 2 a week, if that. I looked at all of the other places mentioned here and had no luck (hope you have better luck). I wound up going to Precision Sails (above) and had a new sale made for not much more than the used one would have been. It is a lighter weight cloth than some of the used offshore sails are, but I stay in the Chesapeake Bay, so it is fine for me. If you aren't in a huge hurry, I would get an estimate from them and use the Black Friday sale, with the slower delivery. You might be surprised.