The easiest way to find spare parts is to type the model number of your microwave in the search box at the top of any page. Please type in the details as closely as possible including the hyphen. Pressing the 'return' key or clicking the magnifying glass will generate a list of parts applicable to that model.
To find your model number check the blog article here.
Alternatively typing the description or even the part number will generate matching parts. Brand specific parts are also listed below but please do check that your model number is listed in the description.