Shelves for Behind the Couch

hello! i recently moved and bought a new couch. I’m really wanting to add more color to the space and ideally brighten it up a little. i was thinking about putting two shelves above the couch so i can display a mix of vinyls, photos, and trinkets (and also so i can change the decor with the season). i was inspired by anna sitar’s shelves and wanted to know if anyone knew where to get these shelves or something similar?

for context, i also added in a photo of my living room.