Candy Microwave Wave Guide Cover Plate49006032

I am seeking a part repair a Hoover HMC440PX Built-in Combination Microwave Oven that has developed a fault. The appliance was purchased in January 2019. In the top of the oven, behind the heating coil, there is a thin rectangular plate fixed by a screw. This plate has degraded and has a large hole in it. It needs to be replaced. Are you able to supply me with a replacement for this part?