Either buy the Colt Peacemaker Centennial or the USFA "Henry Nettleton" (I have both). Both have minor authentiicity problems
I own both too, and I’m curious what authenticity problems you find with the USFA. Are you referring to anything visible or are you talking about non-visible things like not having a type 1 or 2 ejector rod, no milling on the top strap by the barrel for fouling, etc.?