Install a Antennas Direct ,
http://www.antennasdirect.com/store/...VHF-Combo.html , with a Antennas Direct CPA-19 preamp installed above the roof and aimed at about 260 degree magnetic compass.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here are some antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com.
Buy the ronard antenna mounts by typing the word ronard in the solidsignal search box or buy from ronard.
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.antennasdirect.com ,
http://www.amazon.com.