Hi, I randomly came across this jacket, but it's sold out and size 6 :(

Looked all over the internet, but I can't find anything from this brand (Museum) or evidence that it exists, does anybody know where to find it (preferably in size 12 or 13 australian) or anything like it? Thanks!

link if anyone needs more pictures or info, I couldn't get the other pictures to post here - https://shop.lifelinenb.org.au/products/museum-england-vintage-80s-jacket-size-6-zip-front-leather