Is that a counter top model or is it built in the cabinets? If built into the cabinets, the trim kits are sometimes more than the micro itself and seldom can be used for the new oven.
If you can post a picture, it might help. I don't think they made that for an OTR type oven (over the range), that's where a picture will help.
Bill & Brigitte
06 Windsor PEQ, Cummins 400 ISL
2014 Honda CRV