I have a IKEA (Whirlpool) Microwave Typ: MW A03 5A (IKEA Number 903.033.90)
I designed other Adapter for a replacement glass plates.
Bought replacement plate on Amazon:
https://www.amazon.de/dp/B01M0A2JM6?psc=1&ref=ppx_yo2ov_dt_b_product_details
Due to the heat, ABS, ASA or something more heat-resistant is highly recommended.