Both those makers would be good, but where to get one, well....
I assume you have emailed both companies asking them? If they don't have stock, perhaps they can tell you who may stock the size you are after...
otherwise Ebay? Have you tried Google 'Tanker jacket Fury sale" for example...
You could also post in the
Buy/ Sell section asking for a Tanker jacket size xx WTB...
Thats said, if you get offered a BR Tanker for a good deal in your size, hells bells thats better than a SM or WW2 imp any day.
I know you want one of those mentioned, but have you considered a Bronson 'Fury' Tanker...? Amazon, Ebay...
https://www.amazon.com/Bronson-Model-Winter-Tanker-Jacket/dp/B075QL3JXW