Dave T,
To answer your question, USPFA/USFA never made a reproduction of the 1872 Colt open top revolver . They did issue a very limited number of 1851 and 1860 Richards Mason conversion revolvers that were marked both USPFA and USFA. I own one of the 1851 Navy conversions (marked USFA) and have been led to believe, from sources within USFA, that less than 40 of them were ever issued. Even fewer of the 1860's were produced. All of these were either Uberti or ASM imports that were fit and finished by USFA.
CJF