AVR-Chat

For a touch wheel I would normally just draw it out on the copper layer. It's probably not worth designing it as a part, unless you are going to use the exact same wheel over and over.

Even if you could find someone else's design, it's very dependent on the thickness of the overlay panel and might not work well for your design.

This doc from Atmel tells you how to design it: Buttons sliders and wheels sensor design guide

http://www.atmel.com/Images/doc10752.pdf

-- 
Tim Mitchell