Might want to take a look at this and if enough interest they will commercially mftr. Looks like slick setup and should be very cost effective and give max elevation for LR.
http://www.websitetoolbox.com/tool/post/6mmbr/vpost?id=881531
BH
http://www.websitetoolbox.com/tool/post/6mmbr/vpost?id=881531
BH