This is an instructable that will show how to make covers for sailboat winches. These are really expensive if you have to go and buy them from a traditional canvas shop or generic ones from WestMarine. They will easily set you back $30-$50 each. They can be made with about $5 in materials. It's a handy skill to learn how to make boat canvas yourself if you own a boat as the going rate for marine work usually tends to be $100/hr up. It's very easy to save money doing it yourself. I will make these using the Industrial Straight Stitch Machine at TechShop Detroit. These can probably be made on a home sewing machine since you never have to sew through that many layers at once. http://www.techshop.ws
I made it at TechShop.