In August, I installed a brand new fuel tank from NPD in my 1950 3100.
Not only was it a perfect fit, it was better made than the original. It was made in Canada. The tie down straps and cradle were also of a better design and quality than the original. It all looks stock if that interests you.
NPD lists a 1960 in-cab tank for a $151.00. You can't beat that with a stick.
I just noticed in the catalog that 1960-1966 Chevy tanks are "imported" and not the Canadian made ones.
I wouldn't worry about that, though. I also replaced a fuel tank in a 1966 Mustang with one purchased from NPD. It was imported from Korea and is also a very high quality part. All bolt holes, etc lined up perfectly.
www.npdlink.com