Another clone authenticity question

[CWC]

I know this has been asked before, but the latest thread I could find was a few years old, and it seems that the manufacturers are changing offerings all the time.

So I'm spiraling down the rabbit hole of SAA clone options, and hoping you guys can help me out. I'm looking for the most authentic reproduction of a mid-1870's Colt. I thought it was going to be as simple as making sure I got a bullseye ejector head, cylinder pin retained by a screw, shallow v-notch rear sight, and 4-click action. Then I found people discussing Uberti frames being larger than the originals, different grip sizes (army vs navy size???), different barrel stamping from various importers, etc.

Back in the 90's I know there were reproductions being made that were 100% parts interchangeable with original Colts. Is anyone still making them with that level of attention to authenticity? If not, what should I be looking for on the used market?