I only know the Shenandoah clothes range for Genesis, at the DAZ Store. Since they were for Genesis 1, Crossdresser should automatically take them straight to M4 and Poser in a few seconds. Perhaps not the hat, and if the boots fail they are fairly replaceable from a range of others for M4.

"Dynamic Uniforms for Michael 4" is the closest approximation I can find, other than that, but not authentic. There's also the "Bellhop" jacket, Canadian "Mountie" jacket, both very roughly in the right place but far from a good match.

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