I'll try to find a clip from, "The Lost World", so you can see the rig used by Lord John Roxton for two nickled Webleys. Those are the only approach I've seen to the matter.
Here it is, but dubbed in German. The actors are actually Australians. Look especially from about 3:14-on, as the villain who is posing as Roxton leads a captive Finn ( played by Lara Cox) through the jungle. At the last, her hands free, Finn grabs a .455 from her dying escort's shoulder holster. The clip ends, but I own the DVD's, so know that she starts shooting, driving the evil Zoth and his lady away.
This rig is okay for a TV show, but you'll be really uncomfortable in that heavy leather getup. And it will cost a lot, although I think some fan site used to offer copies. Don't know if they'd take S&W's, though. Roxton sometimes wore a Colt .45 auto in a nice holster that may be a Bianchi Model 16 or an Aussie copy. It looked much like the holster the brunette woman wears here, but larger. I felt it was much more practical. I think Helwig in Australia may make it.
Lost World - Lara Cox - YouTube