You should be able to buy a pint can of liquid paint through the forum sponsor, then a guy can locate a local auto paint supplier that can take liquid paint & create a spray can full of that same liquid. There used to be one of those business' around but they sold to entity that changed their business format.
There is probably places where you can get what your asking for, that was a solution that I used when restoring a "same year 1957" license plate once. Hope it helps if you cannot locate a place that sells it directly.
