Searching the entire US all it comes up with is a 1975 Astre tank with 200,000plus miles on it. I am guessing what I have is in better shape than that one. Mine simply has a leaky seam but we do want to weld a sump on and I would rather start with a new dry tank.
Your chances of finding a new tank are slim to none. Nobody makes them and NOS ones have dried up as well. There are places that can custom make a tank to any size, that is probably your best bet. You could probably end them your old one or give them the dimensions and get one made.
Thanks guys. I happened upon a local guy here who has a used tank but in like new condition. Thanks for all the help. With that said if anyone comes upon a new tank in the future and sees this thread please contact me