You mean wall plates with binding posts?
Home Depot's got modular plates, you get them with as many holes for low-voltage applications as you want (up to 8 I think) the plate screws into a standard electrical box, and you snap in whatever you want (binding posts, coax F-connectors, RJ-45 network connectors, RJ-11 telephone, etc) they're not really cheap, but they do a good job of keeping everything organized and clean. Personally, I just left one hole open and pulled the wire through rather than use the binding posts (through a wall backing on a crawlspace in an inhabitable area).
Bren R.
