I had to dig to find what year group those paints came from. You're going back a ways (I found them on a '46-'47 chip sheet). I see you posted on the 2A page; good idea.
While I didn't have an issue matching mine, I could understand the issue with pigments no longer available. I did a search and found this thread with a lengthy explanation on how this becomes a challenge.
That thread had two additional references, near the bottom was for a business in Michigan. Also there was a www:/ address link, on an earlier post, that had this (when I searched for 46 Willys):
https://paintref.com/cgi-bin/colorcodedisplay.cgi?make=Willys&con=k&year=1946&rows=50Not sure if what's provided can be used by a paint store to get close enough or not, but I clicked on the codes in that table and it took me to Ditzler codes.