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Only got text ones. A friend on mine went to get it done. Says they have a choice of fonts there (images too I believe). You can have them lay it out for you, review and they print it off there.
If you want an image (particularly a photo) you would probably either need a medium resolution file or a print out that is quite clear because what they do is a digital print and doesn't require the highest resolution.
Maybe call Mercato and ask for the number of the store so you can cross check with them? Don't remember the name, sorry.