Most people buy separate printers for edible images to avoid any cross contamination. If you do not have enough images to warrant the cost you can order an image from icingimages.com. I ordered one from them and was very pleased. The cake was for a friend's daughter and she paid the cost of the order. It's the Beyonce cake in my photos.
Here is a link to an article here on Cakecentral that will give you lots of info on edible images.
http://www.cakecentral.com/article-topic-8.html
I purchased my printer and supplies from icingimages as well and have been very happy.
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