I also consulted the 2016 NPD catalog. I don't see a bezel nut for the headlamp switch. They make the light bezel though. Page 37, center and lower. I am not real familiar with the 69-70 vehicles, however the bezel nut is made for the wiper/washer. Are they the same thread by chance? If so, those are sold on page 36, second item from the top of the page, center.
-Keith