I need to replace my ge jvm1631wb005 microwave and want to buy easier one to install

Replace the plate... odds are there are none that fit it... it takes 5 or 10 minutes at most to replace it... you will spends weeks trying to find something that likely doesn't exist.

The same manfuacture equpment from one year to the next will usually change even if any of their varuious models even ever shared a common mount to begin with.

Almost every MW today has a wall mounted plate and uses 2 holes through the cabinet above. Lag or toggle bolt mount and done.