Try the website below for panels. We are having a custom breakfast nook built-in made and we are using some panels from PatternCut in the back of the seating area. We spoke to them to ensure their product would be suitable for our use and they assured us it was. They can custom cut your own design if you wish and in any size.

http://www.patterncut.com/index.html

Definitely try the Outwater catalog - they have all kinds of designs, are great to work with and in my experience their shipping is quite reasonable. I'm linking the page for panels for painting or with various wooden veneers; elsewhere in their catalog you'll find solid wooden ones for staining. Here's a snapshot of some of their patterns; direct link is below:

Happy hunting!

Here is a link that might be useful: Decorative Screening panels

This is exactly what I was looking for! Thanks, vtlakehouse and circuspeanut!

I see a fleur de lis design in the above. Attention, French Royalty!

I wonder if they do a custom wood duck pattern?