What Tommy Kelly said. Is it the smooth cylinder you want and steel grip frame?
For a lot less money you can start with a 45 Colt and find a Bisley smooth cylinder (polish off engraving & reblue cylinder) and add a steel grip frame.
Or start with a 45 Bisley, polish off engraving & reblue cylinder, shorten the barrel and add standard steel grip frame, hammer and trigger. People will be knocking down your door for the bisley grip frame and parts.