An outfit I made for an OC that I decided to make, except I edited it for if you just wanted the coat part.
Link to full outfit: https://www.planetminecraft.com/skin/-5567658/
OC skin: https://www.planetminecraft.com/skin/oc-5567692/

You are free to use it or edit it if you'd like. All I ask is to please credit me if you post a skin with this outfit (a link to this skin is highly recommended!) if it looks a little weird, note that i am still a novice and am still trying to learn the ropes of skinmaking!