We have the tactical holster (http://www.newvegasnexus.com/downloads/file.php?id=34854)

But now we need a cowboy holster and gun belt to fulfill our big iron fantasies that would fit the .357, .44, and the Ranger Sequoia.

I have a http://www.fallout3nexus.com/downloads/file.php?id=8751, it probably is easily ported.

Not for the .357 or Hunting Revolver, though.