I replaced my wires with Magnecor 8.5mm wires. To find these go to Magnecor's homepage, call them, and have them tell you where the nearest dealer to you is. (Actually it doesn't really matter where they are, I ordered mine from California and I live in PA).
It is much cheaper to buy them from a store than from the company.
(Around $65.00 a set from a distributor as opposed to $95.00 from Magnecor direct)