I think the 1403 is the dull aluminum color that is a great match for rallye wheel silver? It's very difficult to locate these days due to a Texas plant fire. Seems like most places that have it sell it by the case, which is $$$ Sky Geek, which does plane stuff sells it by the individual can, fwiw.

Google search of 1401 says it's bright silver metallic? https://www.summitracing.com/parts/...goMWCggMVtAh9Ch2nYg8AEAQYAiABEgLMvfD_BwE

This guy took over Totally Autos paint line so he may have some paint that works as well. https://8774paint1.com/collections/all/totally-auto