Maybe I'll show my ignorance here, but when I've restored machines of the same kind (like Pac-Man) I noticed that, while they seemed to stick with the same striping code in general terms, the actual base insulation color and striping color/width vary a LOT as does the gage of the wire. Good, I'm not tempted to be a purist--there really is no exact "original" wire.
Instead of using Sharpies which don't ink well and rub off, I use paint pens that are available in zillions of colors from craft supply stores. I clamp an end into a vise and stretch it out. Then I run the side of the paint pen tip over the wire. If it's a spiral stripe, I twist the wire first. Works for me and when that paint dries (in like 2 minutes), it seems to be as flexible and durable as original.