I have a Bighorn 2925RK, and I have a problem with the microwave oven. Somehow, the part in the center of the microwave, that turns the glass plate has sunk and will no longer reach high enough to rotate the glass. My simple solution is to replace the microwave, but I cannot find one of the same size(Sylvania). The trim frame is made for the exact microwave that I am having problems with. Others are either to wide or to high. Is there a way to find a new trim frame to fit a similar microwave?