I'm not sure you are still here on this platform but if you are, I would love to help out.
I wished I would have seen this earlier, because I personally made bespoken stage outfits.
Outfits...? Yes, these are two different coats.
The first one ist more narrow in both arms and body, while the second is more flared out.
I currently have the first one back at my place to alter it into a more "Assassins Creed" looking outfit, which is more of Aleas "thing" nowadays.
Anyway, if you are still interested in this, or even have done it, let me know.
I'm happy to help out, or would love to see pictures of your work.