Order replacement parts for Oster blenders online at the company’s website. Click on the link under the heading labeled "Parts & Accessories" at the top of Oster.com’s homepage for a list of product part descriptions and prices.
Another option is to search for the model number at eReplacementParts.com. This site provides handy diagrams to help customers identify the various parts of Oster blenders before ordering replacements.
New and used parts as well as new and used Oster blenders are also available for sale online at sites like Amazon and eBay. For a deal, consider ordering a used blender to get the replacement parts.