Sailrite has kits starting at $175, depending on the boom length. I have made several Sailrite kits using a fifty year old Sears sewing machine. Check them out here:
Mainsail Cover Kits - Sailrite <https://www.sailrite.com/Sail-and-Canvas-Kits/Sail-and-Canvas-Covers/Mainsail-Covers> Alan Bergen 35 Mk III Thirsty Rose City YC Portland, OR
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