I believe it does exist, Patrick.

http://www.dxengineering.com/Parts.asp?ID=4830&PLID=342&SecID=33&DeptID={5B8FC0A3-1D03-4603-B76D-F4F0DA53D8C1}&PartNo=AME%2DRCS%2D4


That link wraps on several lines, but it is an Ameritron remote antenna 
switcher, it supports four antennas.  You locate the master box at the tower 
or whereever you want to switch all the cables, and run a control cable to 
the shack.
Hth, Best 73's,
Take my advice, I don't use it anyway.

Steve
Lansing, MI

----- Original Message ----- 
From: Pat Byrne
To: [log in to unmask]
Sent: Sunday, July 01, 2012 11:58 AM
Subject: Antenna Tuner


I believe what I want exists but I haven't been able to find it yet.
Briefly; I have two, soon to be three wire antennaes each connected
by an approximately fifty foot length of coax, out of the shack,
through the utility room, through the crawl space and then
outside.  My hope is to consolidate the coaxes to one, have an
automatic tuner just inside the PVC where the wires leave the house
and do my tuning/switching at that point.
It is my belief that a tuner exists that will meet my criteria.  Or
is it just in my mind!
Is anyone using such a beast and if so, can a total positively know
which antenna is connected?
Thanks a lot.
Pat, K9JAU