Have you tried Wardrobe Wizard? With that tool you only need one version of each clothing item. And the Poser 5 figures came with quite a lot of clothes.  Wardrobe Wizard is part of Poser as of Version 8. And the P5 (and other) figures are in the Legacy content pack.

 

And I'll second the tip about PoserWorld! Besst place for everyday clothing. And they do have some (old but still nice) western outfits, too.

 

There's also a nice western outfit for the G2 males. Sorta Lee van Cleef style :)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.