As of 2015, IKEA does not sell the Whirlpool brand. The user manuals that Whirlpool supplies show only some basic accessories. A complete parts list can be obtained using the oven's model number on the Whirlpool website.
The Whirlpool website can be searched by model number for repair parts. There are diagrams of the different areas of the oven, such as cook tops or doors, to make it simpler to locate the correct parts. The detailed list for each model lists the part number along with a substitute part number for those instances where the original part is no longer available.