all jokes aside, if your connector [plastic] pieces are in good condition, a handful of quality brass connectors, a good crimping tool or two, and a few spools of the correct color wire will easily duplicate a harness for a fraction of the cost of a reproduction harness.
it's not as hard as one would think, just take your time and be patient.
get extra terminal ends and practice on several chunks of junk wire until you get the crimping process down.