The answer is it depends.
Unfortunately this forum is NOT the most "friendly" with the idea of retiring the old fire breathing fridges..
According to a different forum
HERE MANY have had a lot of success with using a Samsung RF197 to replace their double door Nocolds.
Depending on the size of your fridge there are what is known as apartment size fridges. These are typically 9 cu ft- 13 cu ft size which often can be fit into the existing space with some modifications. I used a 10 cu ft Haier brand fridge in mine and you can find Magic Chef and a couple of other brand names which are the same size.
Keep in mind most home fridges are typically a couple of inches deeper than RV fridges so you may need to build out the cabinet a bit.