Where do you buy sewing patterns?

Every commercial pattern producer will have several hoodie/jacket/coat options from which you can choose.

Brands would include Simplicity, Burda, Vogue, Butterick, and McCall's are the cheapest, and most common brand names. These patterns are also suitable for a variety of body types.

You can find these patterns at Wal Mart, as well as anywhere that also sells fabric and sewing supplies.