Can I just ask what is a Xerox shop?
I'd probably just draw/paint a design by hand then scan it in use photoshop to tidy it up and duplicate and then print it out.
Unless it has to be on a certain type of paper?
The bellows papers I removed from a Lachenal are all slightly different in detail when examined closely, whereas at a glance they all look the same. They must have all been decorated by hand - maybe this was normal before Xerox copiers.