Here are files for a shop front designed for a backscene. The model is based on a building in Hereford. I have drawn it full size so scale to suit your model.

A reversed version with slight detail variations is also included and the two can be used together to depict a small row of shops, typical of any British town.

The image is of a completed model on Kier Hardy's Hornsey Broadway model.

Enjoy

Jonny