Have any of you used or created your own nice looking rotary encoder control for Windows Phone or Windows 8?
I've found one made a while ago for Windows Phone 7. http://cespage.com/silverlight/wp7tut26.html
It looks OK but I think it works by "turning" it instead of just dragging up and down like most virtual rotary encoders in audio applications.

I checked Telerik and they don't seem to have one.

I'd love to find a pre-made control like the ones used in the Smithson Martin Emulator Modular software or http://hexler.net/software/touchosc.