Looking for Procor decals


Ignorance is Patriotic
I have several of Walther's Procor molten sulfur tank cars, all with the same roadnumber. I am looking to re-number these cars, but can't seem to find decals anywhere. Microsoft...er, Microscale, doesn't even sell a Procor sheet.

The decals need not necessarily be for Procor, since all I need are the white stencil-style numbers to change the car number. Does a decal manufacturer make a generic, stencil-style letters-and-numbers decal sheet? I know Microscale has letter and number sheets in different styles, but I'm not finding the stencil-style. Anyone?