Just purchased mine from Classic Chevy Truck Parts. It appears to be very easy to install even if you have minimum electrical knowledge. Everything is numbered and full instructions are included. $149.50+shipping. Can't beat the price either. I was considering making my own harness also, but I couldn't buy all the wire and connectors for that price.
Nicely stated.
I have used 4 for those harnesses - a good use of my money and my time.
