I have used the Open House system for a few custom homes and I put one in my house too. It is just a mounting cabinet with rails to mount what ever voice/catv you need. It has room for expansion and even a separate compartment to mount a duplex for the amplifier, if you need one. It is priced reasonably and expansion blocks for voice/catv are readily available. I suspect the Leviton set-up is readily available too. They've been around a while.
