People with vintage cars who want the "right" look want all sorts of odd-size tires. Many of them can be found at:
Coker Tire - Coker Tire
I also know people who have ordered Vredestein tires because those were available in the right sizes, and they seem to be happy with them. A tire with some narrow sizes can be found here:
Vredestein Tires - Quatrac 2
Unfortunately, the low demand for these sizes of tire usually means the prices can be more than you would expect.
-soD