I made a wiring harness for my car. The reason I did was that there wasn't another option. I installed a 300 watt stero 3 amps @ 100 watts, a 12" sub, 4 5 1/4"s, 4 tweeters, eq, remote cd changer (trunk), and a head. Also I have in intergrated alternator, hei, and a trunk mounted battery with a remote solenoid.

With these changes, I didn't want to alter the origional harness or graft into the harness.

At first, I though about intergating the trunk mount battery into the custom wireing harness, but, but it would have created routing problems, with either the power harness haveing longer wires or the stero harness having longer wires.

The stero wiring harness was made outside of the car after measureing and making skectehes, and the stero has a closed loop ground, not chassis ground, which is included in the harness.

Your costs to make front or rear harness would be pennies compared to new/salgave, and it would be a piece of cake to make. The only issue you might run into would be the connectors, but I bet they could be had for next to nothing if you could find a source.