Seeking oven replacement advice.

Hello,

First time homeowner here looking for advice replacing a recently inoperable wall-in oven.

I moved into an apartment in an old building which was renovated about 20yrs ago. Following an unfortunate "electrical event" the motherboard of my oven got fried according to the technician I got to service it. He recommended replacing the oven since finding a replacement would be difficult.

Main issue is that the oven (bosch hbl 745 AUC-02) is an under the counter wall-in oven with surrounding wooden paneling and has a nonstandardized size by modern standards (30'' wide, 23'' H, 24'' D). The gas stove top is above the oven and separate with a stone counter top surrounding. Because of new building codes, we do not want to touch the gas stovetop as it is grandfathered in and works fine.

Questions are:

1. any way to find the niche replacement part for the current oven in this day and age?

2. any reputable retailers that would carry old ovens that may fit the current cut out?

3. any advice in approaching redoing the cutout to fit a modern 30'' oven (H is about 6 inches more than current) without redoing the stove top?

any other unanticipated advice is wholeheartedly welcome.

thanks

https://preview.redd.it/xb0o1vs2drbf1.jpg?width=4000&format=pjpg&auto=webp&s=3b4a85f73e4355da9ed258f9e120b3dd2de7f61b