The FlashZebra cords for the Plus III, FlexTT5, and MultiMax are a very recent addition to their product line. Have you tried them? I am thinking of adding one or two and was wondering about the build quality compared to the PW cords.
I have been using the latest ACC PW cords for over 5 years without issues. They are very well made but as noted very expensive. Good Luck and Enjoy your Nikons!