Talk to Steve Young about the GTB wires.
A: To make sure he's OK with it.
B: To see if maybe he'd want to be a bulk buyer.
My understanding is that GTB bought truckloads of blank white wire and ran it through a house-built wire striping machine to make whatever colors they needed. This eliminated warehousing (no need to store hundreds of colors) and they could just make whatever color they needed for the run they were producing.
Being that it was a house-built machine, they may have a patent on it, and therefore Steve would be the holder said patent.
Better to ask him than to be served with a cease and desist letter from his attorneys.