Nauls is seen wearing a beige N-3B style parka throughout the film, but with a few notable elements, such as brown triangle pocket stitch supports, black snap buttons, and a silver zipper. The exact match I managed to locate because of the exceptional lack of a shoulder zipper pocket, present on military style N-3Bs. The brand is identified as Golden Fleece, and I managed to find myself one. Although, its a hair on the smaller side, it ultimately fits well enough.
That is a great collection you are putting together. I hate the scalpel, it makes me cringe when I see the size of the cut they make just to get a bit of blood out.