Toolman
Explorer
Sail cloth may not be water repellent... you should try a rip stop material like an RTT would have.. remember you want this to last. A qualified sail maker also makes covers for sales and understands how to make the material work to shed water you don't want soggy sails and you don't want to get wet if it were to rain. I bet it would cost around $500 if you provided the material and zippers.. I thought about it and I think if you found a used top at a junk yard or on craigslist the sail maker could convert it and it would have the same cloth and zippers.. plus windows that would pop in and out.