Pokemon Boy Room Where Can I Find 10.25 Inch Wall Paper Borders??

Where can I find 10.25 inch wall paper borders?? - pokemon boy room

I'm redoing a bedroom, and I have a 10 1 / 4 inch wall, found at the border paper to fit into certain molds. This is a 6th child in the room with all superheroes (Spiderman, Pokemon, etc. .. ), or skateboarding, sports, fishing, or anything that would be great, I have the whole day searching and can not find anything, thank you!