Looking for Captain Call’s coat

[GreyGus]

Looking for a source for a coat like Captain Call wore in the Winter scenes in “Lonesome Dove”.
Long loose fitting like a duster, but seems to be made of a heavier material.

 

[Jon Crow]

Looking for a source for a coat like Captain Call wore in the Winter scenes in “Lonesome Dove”.
Long loose fitting like a duster, but seems to be made of a heavier material. View attachment 754100

Looks like a wool overcoat, Gus wore one in brown