Does anyone know where to find something similar to this for buns?

My bun is a mini lop so she’s tiny for a bun but still not the smallest. The measurements on this are 9.84 x 9.84 x 3.15 inches (LxWxH) so it’s till too small for her💔 and just wanna know if anyone knows of something similar to this? Like any bun, she loves burrowing and doesn’t really have anything to burrow in because I can’t find anything that she fits in lol