David,
You can buy the wire that Painless sells in 25' or 50' rolls. It is head and shoulders about the machine wire sold at Depot and most electrical supplies. I have my car wired with it and it is much more flexible so it would be less likely to break the wires from vibration and the covering has a higher temperature rating. They offer 20 different colors in 14 gauge. I know you like using quality components on you cars so I thought I would suggest this.
Curtis