PJS
Maybe try to just sell them a color laser printer? I know that ink based systems will do the trick, but not sure if Kyo has any of those. I recently sold a Ricoh 11x17 laser printer to an account for the same process. However, I had to make sure the printer I sold them printed at 1200 dpi. You may also want to change the vellum. Make sure you are using vellum for a laser printer and not ink based.
I would check with Azon and tell em the P4P Hotel sent you.