For the wallpaper you could have a custom print run done. I own a small printing company in the UK and we do bespoke wallpapers from time to time. Not sure where you’re based, but I’m sure you could find someone localish to you.

With regards to the design, unless you happen to find an exact match, which I’m doubtful of, you would end up just ‘taking a guess’ to create the rest of it. Or adapt the design into something you like yourself so you have old and new both in one.