On 2008-05-14, slate_leeper wrote:

http://www.improvementscatalog.com/product/id/100584.do

Looks quick and easy, but will they be sturdy enough? Alternative: cut
exact-depth spacers from steel tubing?

This is not a code-compliant solution. You actually need to extend
the box, not just bring the device forward. The NEC regulates the
allowable gap between the front edge of the box and the wall surface
when the wall is made of combustible material, like wood paneling.

Cheers, Wayne