Unfortunately, your location is quite remote insofar as TV signals is concerned.
The Y10713 lends itself to ganging and stacking, given it's balanced 300Ω output. 450Ω twin-lead can still be found, or you can make your own open wire twin-lead... Here are a few links re. ganging and stacking,
http://forum.tvfool.com/showthread.php?t=1024
You can apply the same principals to ganging and stacking an Antennacraft MXU59.
I would consider experimenting with a Rhombic if I was in such a remote location...
http://forum.tvfool.com/showthread.php?t=2865