Regrettably, I haven't been able to find any such tool.
Paint companies love to keep up on the latest trends, so often they will change the name of their colors... So what you may have bought 20 years ago as pale blue, may now be called duck egg blue. The exception to this is hobby paints for military vehicles, often they include a federal standard number (FS 36134 will be the same across many manufacturers now matter what kind of "grey" they may want to call it). Estes rarely included manufacturer color recommendations. The only exception, that I know of, was with their Jayhawk, which was Krylon Mandarin Orange.
My recommendation... go out and buy yourself a Keep off the Grass type plastic sign. Then buy the colors of primer you will likely be using (filler grey, grey, white, rust, silver, black) then mask off the back of the sign, and paint a strip of each color, as well as leave a strip of raw plastic. After that has been allowed to fully cure, mask it again and paint strips of your final color candidates across all of the base colors. With this method, you might be able to take a color that was by itself close, but just not quite right, and combine it with a base color that makes it perfect.