There are tons of papers available that would go with your midcentury home. Many people tire of a paper quicker than they are ready to redecorate and they can also look dated in a couple of years. Metallic papers were big im midcentury...perhaps a metallic silver paper? Are you also considering paint? You can get it in so many textures and a blue wall to match the blue in your loveseat would be lovely with some midcentury art and sculpture, or photographs on it. A mirrored wall with or without art or sculpture would also work with midcentury. These treatments are easier to adapt should you wish to change the look slightly from time to time. I would suggest replacing your stairrail with chrome or acrylic if that is in the budget...see how well the loveseat frame looks with the fabric? I hope you will post the "after" photos for us to see. Above all, enjoy the process!

Here it is (but I'm guessing it will be available from more places): http://muralunique.com/index.php?route=product/product&path=53_56_77&product_id=937&sort=p.price&order=DESC

Thanks It was through Houzz I was ordering it!!

No suggestions here apart from getting the wallpaper you want either shipped to you or searching around for it!