I have a Fairclough winter cover for a Catalina 36, which I've used for the last 5 winters. I've had it on my 1985 MKI, but it may fit other generations. It goes around the mast, and relies on the boom for support. It covers down to, but not past, the toe rail. There is one zippered door on the starboard side. It is in fair condition, with some wear and chafing, but it is ready to be used without needing repairs.

I offer this cover for $100, via Paypal or a mailed check. It is located in Leeds, ME, and if you are not able to pick it up, I'll ship it UPS for another $30.