Looking up the link for a one-box for another forum I see that Arlington has some recessed boxes for interior use.

http://www.aifittings.com/whnew100.htm

They also have a multiple gang box for wall mounted TV that will also handle power and data.

http://www.aifittings.com/whnew98.htm

This is not new. It is an outdoor recessed box so that it has an inuse waterproof cover without the big plastic blister.

http://www.aifittings.com/whnew89a.htm

All standard disclaimer. Just thought that they where interesting to solve special problems.