There are also resellers and secondhand sellers who specialize in old patterns. They are the next stop when you find that the pattern company doesn’t have the one you need. Be aware that the sewing pattern companies reuse their pattern numbers. When you are searching for an older pattern you need to know not only the pattern number but when it was printed and a description of the item so that you can find it. Simplicity 1234 could be a dress one year and a few years later it could be a shirt pattern. You can search their site for specific pattern companies such as Butterick, McCall’s, Simplicity, and Vogue. You can also browse by era and type of clothing.