Combination microwave ceramic plate (Greenstead CO4)

Hi. I bought a second hamd Panasonic combination microwave/grill. Does anyone have the round plate (the thing in the photo just under the grill they no longer need. Maybe you no longer have the oven but still have the accessories. It doesn't need to be from a Panasonic microwave/grill, just so long as the enamel coated plate has a diameter of about 30cm. Many thanks.