http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS07/N00026834.jpg
It's part of a RGB set too.
Here is a color version. The sequence tracks Mimas against Saturn, so the images don't line up perfectly (hence the reason my color image isn't 1024x1024. The Mimas images barely touch each other, so I lined them up separately and placed the color image where the green (middle) frame should go.
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