RE: Wire Source?
In your search, keep in mind that good servo wire has a very high individual wire count and is very flexable. String flexable. Some of the stranded wires have a very low wire cound, down to about 7 and this is only marginally better than solid wire. Viberation will cause you troubles with the stiff wire. Your best bet would be twisted sets. IE from the servo wire/end comunity. It only comes in three strand, but it would be an easy task to strip a signal wire out and wrap in into the other three. Your wire will end up cousting you twice as much per ft doing that, but you will also have a bunch of long battery leads when you are done.
The only other option would be to get some computer flat cable, and strip off the excess number of wires. Again though, this us usually stiff wire and is seldom 22ga.
Don