If you have time and patience, you can learn how to make your own Elvis "photo" out of Post-It notes. Once, long ago, I made a Marilyn Monroe face out of dominoes and this is sort of similar.

The folks who did this have such a neat website on it, I'll just pass you through...
It'll open up in a separate window. Or if you're the cautious type..

http://www.capstrat.com/cs/insight/articles/post-itmodernism.cfm

They give instructions on how to make one yourself and also how to take any photo/picture and make it Post-It Note graphic friendly.