Searching for a specific type of wallpaper

[newfrickinshow 100]

Okay, my Youtube reaction channel has run into a bit of problems involving Hasbro copyright claims.  Once because they flagged and blocked something I considered fair use and once not because I just plain messed up and forgot to make the PIP window smaller when I was doing the video editing.  Either way I'm up to two strikes and one away from losing my account. 

 

That said (as well as improved camera and better editing skills) I've decided to completely change up my video formatting/presentation and will soon be deleting most of my old videos with plans to come back and re-record with a more 'not getting sued' thought process.  I suck with a lot of this kind of stuff so I thought I'd ask for ideas or places where I could look to find some background art.  There's plenty out there but as I will be laying two picture-in-pictures on top of the image I could use a good selection of images where at least one side of the image is more or less blank.

 

Any image ideas, places I can look, actual images, etc would be greatly appreciated.