Genuine KitchenAid blender parts can be found at ereplacementparts.com. KitchenAid does not appear to offer replacement parts or accessories for their blenders on the official website. However, the company does provide parts lists by model number.
On the ereplacementparts.com, KitchenAid blender replacement parts can be found by entering "kitchenaid blender" in the search field and clicking the Search button. This generates a list of all the blenders manufactured by KitchenAid, ordered alphabetically by model number. Finding a specific model number can be simplified by entering the model number in the field at the top of the list. The list includes current and discontinued models.
Clicking on the hyperlink for a specific model number, 4KSB5TG4 for example, takes the shopper to a list of all the parts available for that model. Most parts, such as blade seal gaskets, base feet and blending jars can be easily replaced by the average homeowner.
More complex parts, such as motors, switches and control panels can be installed by more technically advanced owners, but it is recommended to take the blender to a small appliance repair shop for these types of repairs. To find a parts list for a particular model on the KitchenAid website, hover over the Service and Support tab, click on the Manuals and Literature link, and enter the model number in the search field.