Warden,
Fastlane will have the sensor wires and they are sold separately (the bad news) but they are cheap (the good news). Just so it's clear, the sensor wire is not the wire from behind the fender to the caliper but the actual sensor that goes into the brake pad. If you haven't seen one, it's a little plastic rod about the size of a pencil head that inserts in a hole in the pad itself. The "rod" is actually a wire, the other end of which you attach to a female plug on the caliper. When the pad wears down enough to expose the wire underneath, it grounds a circuit on the rotor and the light on your dash lights. Since it won't ground evenly at first it tends to flicker and will only go on when you hit the brakes and cause the pad to press hard against the rotor. Usually you have a fair amount of use left on the old pads when you first see the warning light flicker.

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LRG
1987 300D Turbo 175K
2006 Toyota Prius, efficent but no soul
1985 300 TDT(130K miles of trouble free motoring)now sold