Dishwasher door seals can be purchased at a number of retailers including Amazon and Sears, as of 2015. Both retailers allow buyers to search for dishwasher door seals by brand, but many seals fit a number of dishwasher types.
When buying a dishwasher door seal from Amazon.com, search by brand, type, customer review or type of seal. When searching a retailer, such as Sears, for a dishwasher seal, the site lists the parts by brand, then by part type. The door seals are found on the pumps and plumbing page, and they can be further refined in the search box.