My glass on the outside of the oven door has been broken and I can't find one to replace it (NLA). So I am going to replace the oven. I need the size of the over all unit and the size needed for the cutout. The instruction book that came with the oven doesn't have any dimensions so I really need to know before I go to buy. It will be very hard to enlarge the opening that the unit is in now so I need the specs. Thank you.