Butcher's coat was in all likelihood custom made for the production. You might be able to find a close enough knock off out there, but you'd be better off sending IndyMagnoli a PM and asking him about doing one. From what I've picked up on the details it's basically a western riding coat with some added detail on the shoulders in what looks like a waxed cotton fabric.
I own a coupe of Magnoli Clothiers pieces, and they are worth the price. They're not cheap cosplay grade tailoring but quality garments.