you can make your own Testors/Model Master list
go here, check and uncheck the ranges to key in on Testors/Model Master,,,,,and then you can make your list http://www.paint4models.com/
you will find that when RPM bought the Polly Scale stuff, they eliminated some of the duplicate colors, they deleted some from the Polly Scale line, and some from Model Master Acrylics. Then just recently, they cut the Polly Scale line, and have been adding some of the Railroad colors (not the formula) back into the MM Acrylics.
By making your own list, you can see where the new gaps are in the Enamel line. (they are just recycling their "Acrylic trick".
Testors will figure out the results of this after about a thousand "where are the Xtracolour and Humbrol dealers in the US" posts, lol
Rex