There is a national company with a local store to purchase pieces of leather goods and Jewelers Rouge to make a strop for sharpening chisels, plane blades, and knives.

The Tandy Leather Company, 73 Princeton St. Unit 10, North Chelmsford, MA.  They supply all kinds of leather goods and supplies. It took less than a minute to get the piece of leather and Jewelers Rouge I was looking for to make a Strop.  They carry multiple grades of leather and thickness's plus 10+ grits of Jeweler's Rouge for various applications.