[TowerTalk] Radial wire and antenna spacing

[n4jbk@bellsouth.net]

Does anyone know of a source for inexpensive wire for making up a radial system? Being as there is so much wire needed price is a factor unfortunately.
Also I have a telrex 20m646 and a hygain 155ca about 11 feet apart, I was looking to put a force 12 ( or other kind of 12 and 17 dualbander) between them, the 20m646 is at bout 100 feet, the 155ca is above that. 
Thanks for the input. 
73 joe N4JBK