I bought an american autowire kit from another bolter who ended up using a donor harness. I haven't installed it yet but it looks to be of very good quality. Their tech support sent me the install instructions even though it was bought many many years before. I don't like wiring but with planning and patience, it isn't the hardest part of the build.
Keep those extra circuits as has already been mentioned. Just tie em up and tape em off. You never know when you will need to add something. A set of fog lights, a radio, some new technology that hasn't even been dreamed up yet.
I know I need 8 circuits for the stock items, but I know I will be adding a radio, fog lamps, possibly some other little items like an auxiliary port.
