I used 4 different colors of Rustoleum to get the match on my '73. Later on I found an outfit that sells RAL colors in small volumes, so you can mix the color you want without too much distress on your wallet. Once you get the color you want, you could get it matched.

https://www.lowvolumepowder.com/RAL-Powders-and-Paints

The 3 colors I am working with now to get the color match I want are: RAL6027, RAL6021, and RAL6019.