Where can I find an F-53 75 gal. fuel tank?

Any ideas where I can find a new/used gas tank for 1990.5 Ford F-53 chassis? Ford no longer carries new ones. Prefer finding something in the northwest. Thanks in advance

Give "Transfer Flow" in Chico, northern calif. They only make diesel auxillary fuel tanks but they might be able to tell you about a replacement for an original fuel tank.