Does anybody know of a 2 door reach-in refrigerator that can also become a reach in freezer if I so choose? I know that there are combo units that have 1 door for a fridge and the other for a freezer. This is NOT what I need. I'm looking for something that I can use as a refrigerator but if I don't need it anymore but need a freezer instead, I can just lower the temperature and it will be a freezer. Thanks!