I was the ebay high bidder on a used gas tank for the Ranch Wagon. It came out of a 1958 Edsel Bermuda Wagon, and was in very good shape. This particular gas tank is interchanges between the 1957-58 Ford Wagons, 1957-58 Ford Rancheros, and the 1958-1959 Edsel Wagons. The top side which is usually rusty beyond use, was just surface rusted. It was quite a surprise to find a tank in such good shape, and for a decent price. New tanks were reproduced around 8 years ago, and have since been discontinued. The remaining tanks are sold by parts vendors for about $450 dollars!
It also came with a good filler neck as well.
Ranchwagon's Blog 