I get the spools of red and green coated copper wire from Radio Shack. *Up* and *Down*........ I hooked my lines up backwards once and was barely lucky enough to not destroy the plane so I went to a *line wrapping for dummies plan*.
Michaels carries the stainless steel wire around here, Randy.
(of course, I still have the copper wrapped coil out of a crank telephone, I will never use all of that stuff!)
Mongo
EDIT: I FORGOT! Wally World carries cheap cards of different metal wire, including a fine copper wire, uncoated. I like their thick Brass wire for some applications (like securing tail wheels), but not line wrapping.