Columbia Gorge Stoneworks will make outlet covers out of your own material (marble scraps). Not cheap, but they will look gorgeous with your marble slab backsplash. Well worth it as a finishing touch, and Jamie and David were terrific to work with.

Columbia Gorge Stoneworks

Thank you! I'm a little concerned about the cost of shipping marble to them on top of the expense of the outlet cover. I'm sure they look fabulous though.

crl_ - your backsplash sounds like it will be gorgeous! Any chance you can get the pieces they cut out, for the outlets? I decouppaged ours.... photocopied a sample board first. It took time but the results were really good.

If I were concerned about making them invisible, I would faux paint the covers. Just a slight bit of veining to blend with the marble around the outlet is all it takes.