FWIW, I had an old Duplicolor spray paint and their clear coat that was a fairly close match to the GB5 repaint on my Challenger. Unfortunately, Duplicolor discontinued that paint series and color option years ago and I have very little left. It wasn't even a Chrysler color; I found an old Chevy/GMC truck color that seemed pretty close.

Here's a pic of the car's license plate bracket (top) and a metal paint test strip on the bottom I used to see how different colors compared. This is (was) that particular Duplicolor with a light clear coat. Not perfect, but it was decent for doing the engine compartment years ago.