There used to be a tool that was an adjustable template for the high and low wiring chases.  It came with patterns for single, double and triple-sized boxes.  Plus they included the proper size router bit for cutting out the boxes.   I just haven't been able to locate it on the web recently.  Can anyone help me with identifying this tool?

Try this link:
http://www.ziproute.com/shop/home.php?cat=1