I think the Frigidaire 18.2 Cu. Ft. Top-Mount Refrigerator - Silver Mist - Model FFTR1814LM is what you're looking for. The one's I've found online run about 6-1000.
Edit: If it's not, I don't see why you couldn't talk to a local mom and pop place. I'm sure they could tell you if it's possible to convert an old one to that.