Wasn't able to get a harness made however I did find a salvageable harness off a friend's parts car that I can make work and have done in time for DGRR. .
While pulling the harness off I looked for the illusive alternator connector that was thought to be on the charge harness and that I presumably had removed years ago. . That is not the case, I confirmed it's on the engine harness. Glad that mystery is solved!