3-D Printer to Make Lionel Postwar Scale F3 Steps?

I have a set of Postwar Scale Lionel ABA Milwakee Road F3s, 6-34586.  Several of the cab steps are broken off.  Wondering of someone can make, or knows someone who can make these steps.  I showed an example to a local person with a 3D printer but he said the steps are too small for his printer with a 4mm nozzle.

Pictures below.  Color doesn't really matter.  I can paint.