Wires Through Walls

["BrianEWilliams" <sorry_no_email@xxxxxxxxx>]

I'd like to put a media server in my bedroom closet.  The problem is
that there is no power, cable, or ethernet in the closet.  I could run
wires along the baseboard, but that is ugly.  I could pay an
electrician, but that is expensive.  The idea I have is to drill a
large hole through two pieces of wallboard and run the wires through
that.  This would be behind furniture and not visible from the bedroom.

The simplest thing I can think of to do this cleanly is a plastic
conduit that has removable caps on both ends for when it is not in use,
and 'flanges' on both sides to cover the rough cut of the wallboard.
Looking at it in profile, it would look like this:

     _   _
wall  | |  wall
wall _| |_ wall

In this diagram, the wires would run between the |'s.  The _'s are the
flanges.

Anyone know if something like this is available?