James,
If you are looking for 100% original I have a gut I know in Sweden,
Torbjorn Fredriksson, that is the king of wire harness! He is simply the best.
All the cars that he restores is show winners! It is ofcourse not cheap but the
result is just what you want -110% original in color etc, he even does all the
plastic parts so it is just to plug it in, amazing! I think I payed about $600
for a complete harness for my 58 Plymouth and it is worth every cent knowing
that your car isn't burning up while driving one day!
He can do complete harness or just parts of it if you like.
-Daniel Andersson, Sweden