Here's the link for the vinyl dye
https://www.npdlink.com/product/inte...7432?year=1968
And also the page from the resto guide with the ppg (ditzler), Axalta (DuPont), and BASF (Rishned Mason) numbers..
I work at a ppg shop, so I can see what I can find Monday. But it looks like there's a positive review for the NPD color, for whatever that's worth.