Keep in mind that large companies go through a LOT of wire building the harnesses. They just special order the wire in mega spools with the prining of there choice.
If you find any large wire manufacturer who is willing to do an order for you I am sure they will print anything you want on it. Keep in mind you will probably have to buy it in 100,000 foot spools at a time. Not sure what you will do with the other 99,990 feet of wire with your custom print after you use the 10 feet you want?