Sears Microwave

by terry
(Rochester,N.Y.)

Put a heavy metal bowl in the microwave. It burnt a hole into and through the inner screen and the metal screen. The cost of a new door is prohibitive. Called Sears and ordered a "new screen" They sent the front screen only and the shipping was more than the part. How can I find the part numbers needed? I have explored part sites, inserted the model # with no luck!