I went through your dilema for two years trying to find a replacement. Even considered buying a tank that could be modified for the filler but a top notch welding shop said the metal was just to thin to guarantee good attachment of a filler pipe. Not the kind of thing I want hanging on the back of my car. My solution was to take the tank to an aluminum fab shop and have a reproduction made - I was going TBI anyway and needed a deeper tank at the front. $500 but what a beauty with every fitting where it belonged and it fit like a glove. They welded slosh baffel's in, vent lines and a drain plug as well. I think you're going to have to bite the bullet on this one and have one made (your choice of material) or mount a fuel cell in the trunk. Let's face it, anything you buy used is still going to be 52 years old.
