Yea, no go on autocity classic, I tried there already. Guess I'll have to try and fix it. They didn't make many of them, so nobody's making the tanks for them. Thanks for all the help.
You might call Ricks tanks. They're very expensive, stainless steel, lots of options. Ive got one, stock 55 fuel gauge, with an in tank pump for the EFI. But really nice workmanship, and fewer worries from the ethanol/water corrosion.