Need Fuel tank for 1993 Itasca

Steam clean the tank and find a new tech.

As long as the tank hasn't rusted to the point that it no longer has integrity, it can be cleaned.

I also understand that there are products that can coat the inside of the tank, though, sorry, no first hand knowledge of the product or procedure.

Cleaning and coating is an option.
What is make, model of chassis and tank capacity?

Radiator repair shops ( if they’re good shops ) rebuild fuel tanks; I’ve done a few thousand of them……….