I'm having him get the name so that I can look it up in a paint supply book.
Probably the best bet! At least you can compare it to similar shades in the book before taking the plunge. Might also be a good idea to not try comparing the sample in the book against the final result in the metal...it's bound to look different no matter how much effort went into making them look the same - a flat piece of coated paper against a three dimensional painted and lacquered metal surface just are not the same. Best of luck.