Very good. The dimensions of the screws can be obtained from the AMK Guide To Ford Fasteners (or the appropriate spreadsheets in the Forum's Library).
For the inserts, I believe that Ford's suppliers used the same set of molds for all colors, cleaning the molds between color changes, so the part number marked on the item did not include the color "dash number". The Ford part number and logo are the only way to identify genuine parts. In my pile of stuff, I have one Scott Drake insert (bag dated 3/1/2011) and it has the screw head recesses and the notches at the ends. It matches the used Ford inserts I have dimensionally.
I also have 8 cups, all from 65-66 Mustangs. I assume they are original, the metal bottoms are rusty on all and I've have them for well over 20 years, which, I believe, would be prior to reproductions being made. There is no visible ID markings on any.
Jim