I just finished making another pair, this time I didn't twist the wire, but used vinyl electrical tape every 6" and it looks (and sounds) like the other pair without the hassle of twisting the wire (thanks Chad).
To source the magnet wire, go to a local motor rebuilding shop, they will have all kinds. Or, buy a coil bobbin (for speaker cross-overs) from Parts Express or Madisound and unwind the wire (that's what I did). Of course, you have to scrap off about 3/16 of an inch of the coating on the wire before soldering.
To source the solid center conductor (and it's 24 awg BTW, not 22 awg) buy some unshielded cat5 wire and cut it out. I tried Radio Shack wire and didn't like it. I think it may not be a good grade of copper.
The RCA jacks are Neutrik NYS373, black, avalible from Parts Express.
My newest 1 meter cable cost for the pair is about $7.80. They sound real good. The solid wire makes them a little tuff to manage, but the Neutrik connectors have a nice grip. They are of the correct dimensions too as some RCA jacks do not meet specifications on pin diameter and sleeve I.D., which can damage your RCA jack.

Wayner
