Here 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. Mount the Y5-2-6 low band antenna on bottom and the U4000 UHF antenna on top of Y5-2-6 antenna with about 2 feet separation. Here are some places to buy antennas and etc. ,
http://www.antennacraft.net ,
http://www.solidsignal.com ,
http://www.amazon.com. Type the words , ronard , or , uvsj , in the solidsignal search box.