I might be asking my question in the wrong group, so feel free to send
me packing if I am.

The background:

Our high school just installed a scoreboard for our new Varsity Softball
field. The scoreboard controller talks to the scoreboard via a cable
that has a 1/4" TRS plug on each end.

http://www.planetronic.es/images/ak2563.jpg

One end plugs into the controller and the other end plugs into a jack
that is wired to the scoreboard in the outfield.

Unfortunately, they didn't ask anyone involved with the team which
dugout would be the home dugout, and they installed the jack that the
controller plugs into in the visitor's dugout.

We are currently using a 20' cord so that the operator doesn't have to
sit in the visitor's dugout...he sits outside the dugout, but is still
on the visitor's side of the field.

We'd like to move the operator to our dugout, but we can't get the
school to move the jack until after the season is over.

The question:

Could we use a wireless transmitter and receiver in place of the cord?
If so, we could put the receiver in the visitor's dugout and plug it
into the socket and the transmitter would plug into the controller. The
range would be under 100' and the dugouts are made of concrete.

The problem is, I don't know where to start looking for this type of
equipment, or even what I would need to know to spec it out.

Any suggestions would be appreciated.

Thanks!