Looking for Dye Sub HQ Printer Options for on site printing at events via Linux OS

Ok, for those who do not know me, I am a sports photographer. I am always looking for new ways to give clients something a little different. I am an Ubuntu Studio user on my home computer and I was thinking of a new option for my clients. I want to possibly start providing prints to my clients on site. Since I do not use windows, I am looking for some type of option that includes a Dye Sublimation printer that will print 4x6 and 5x7 images on spot. Has anyone used a setup like this using linux? I am thinking that if need be, I can use a raspberry pie to run the printer if we can get a printer that will run under any type of Linux Print or CUPS.