Pottery Barn 'wood gallery' wall frames...

Does anyone know if there is any place I can get frames, similar to the ones posted in the link below, for cheaper? I am looking for ones with a black frame. THANKS!

http://ww2.potterybarn.com/cat/pip.cfm?src=shpcaccfrafrm%7Crshop%2Fshpcacc%7Crshop%2Fhme&pkey=caccfrafrm&gids=p284