>>7279573Backdrops are probably best custom made. Bandai actually just announced a wall (in small sections so you can build it however you want). It's probably gonna be pretty costly to build a backdrop that way.
For props you could search for some Schleich stuff, they're normally a bit to small, but certain items might work. I bought a little pack of just four different bones. They had a fantasy line, "Eldrador" maybe there's some stuff left over.