Where can I find a UI element of code on the internet to implement an LCD like display as in XCode 4 and iTunes.
The one in XCode 4 is a bit more advanced than the iTunes ones, it offers more functionality.
Is this a standard element, or is it a private Apple one?
It's a private Apple one. I built one for myself using a graphics program for the background and the interface builder to design the control.
I used Opacity as the graphics program and let it create the Core Graphics implementation for the background. That way I can even change the color of the background and it's easily resizable.