I rarely use the included grilles, so I threw them away, now I need some for my kicks, (and hate the cheap waffle grill style).
I've found these,
http://www.simplyspeakers.com/speaker-grill-metal-mesh-sg-m6.html
but do you guys have any better solutions? I am NOT a woodworker so fancy router reveal cuts etc are out of the question.

 

wire mesh covered in fabric, grills from another brand, 1/4" wire bars, expanded mesh, carpet with the backing removed...lots of options.