Or more specifically, I suppose the panels I am familiar with are not actually "keystone", but rather banks of rj45 jacks with punch posts on the backside. Photo attached from our home.

Edit: I get my stuff from a nearly "local" wholesale supplier: http://www.computerplug.com/nav.php?cat1=Networking&cat2=Patch_Panels_and_Accessories The 12-port CAT5E panels I use are about CAD$22 each; a 96-port CAT6 panel sells for about CAD$200.