I had an adhesive vinyl overlay made at Kinkos. Granted, this will vary depending on the Kinkos employee you get. I lucked out and got somebody that knew what they were talking about.
It was a full color, ink-jet plotter printed adhesive vinyl. Then the guy took that and cold laminated it. He said it would be "Outdoor Vinyl Sign" quality, so it should be somewhat durable.
I've had it on my CP for almost a year now, and havn't had any problems with it yet.
If I remember, I was charged by linear foot at a certain width, so if you can find that out ahead of time, you may be able to fill in some of the blank area with spare graphics or an instruction sheet, or something.
Hope this helps.
-Stobe