I started this thread over in the Modeling Railroading group but these vintage signs will work just as well for the auto modeler. Just download them, size them and print them yourselves.
Hint: Print these on glossy photo grade paper for a “Enamel on Metal” sign look or on cheap typing paper for a distressed “Poster” look. (Such as for the circus signage.) Or to apply to a brick wall for a “Painted on Look.”