You would need to contact a supplier who sells the cloth braid wire and see if they can order it but it usually means you need to order many feet as a minimum order.

Often I make my own using unwaxed cloth braid wire using different color “Sharpie” markers. At times I need Green or Red for special pickup orders and enjoy making my own wire. You need to go to an art supply store and they have many colors available besides the standard black, red and green. I’ve removed the wax from the braided wire by putting the wire in boiling water to loosen the wax. I then color the wire with the marker using the desired color and this works pretty well.

You can also use wax crayons to color the braided wire. I’ve even used “Rit” dye after heating the wire to remove the excess wax and then dying the braided wire. I’ve used this process on newer Fender white Teflon coated hookup wire. The “Sharpies” work well with the Teflon wire that is not waxed and I often make the yellow hookup wire this way. Use permanent markers so the color doesn’t rub or wear off as easily. There are several techniques you can use and it is best to experiment with different methods without paying for large amounts of wire you will never use.