michael, that is my project by the way. I strongly suggest that you find a used wire harness if at all possible. When I created the project the wire harness was less than $15.00. Is is not close to $75.00 for the exact same harness.
Just out of curiosity, what's considered "decent price" for one of these? I might be inclined to buy one, if I can figure out how to make it work with the stereo & amp I had installed. Darn amp took up the room under the rear passenger side I could have used for a sub.