I purchased the fuel tank for my '39 Plym from TANKS... www.tanksinc.com (320) 558-6882 CST
I used one of their poly tanks, it was a direct replacement for the original tank... Their catalog says they also make steel replacement tanks.
I have purchased a couple of other tanks from them, very prompt service....Bill

Does anyone know where I can purchase a new gas tank for a 1948 unmodified Plymouth Coupe?
It may be a new reproduction or NOS?