A variety of retailers sell Buddy heater parts. Major ones include Sears, Amazon.com, Bass Pro Shops, Walmart and Ace Hardware. Alternatively, replacement parts can be purchased directly from the line's parent company, Mr. Heater, or from a smaller local establishments such as Beals & Bob's in Iowa.
Replacement heater parts can be a very technical industry, so many of the sites that sell them also offer manuals and diagrams to assist customers in determining exactly which part they need before they place an order. Mr. Heater and Beals and Bob's, among others, offer this service. Older parts can be more difficult to locate than those for the newest models.