Minor correction:
I know you responded to a person regarding a Sig "TTT" model, which is different, but Sig does offer models which have the traditional rounded slide which is no different than any standard 1911. True that the Sig pistols have an external extractor, but so do the S&W E-Series guns. I don't think the Sig "strays" any further than the S&W from the original 1911 design.
Regardless, I have a reverse two-tone like the one in the link below and it is a heck of a pistol for under 1000 bucks: