Colt ejector rod heads

I need a Colt revolver guy. I'm going to have ejector rod heads made up. I would like a sample of all the knurled ones with the models that they fit, or a reference with that information.
I know from experience that Colt is all over the map with these, but hopefully someone can help me straighten out this road.
I ordered every different part number that Numrich showed, only to have them send me all the same head!
Please contact me at gungarage@gmail.com, or reply thru this forum.
Thanks in advance--Al