angelica - I've seen some pretty cool ones online. There are specialty pet furniture stores that offer a wide range of options. You might want to browse there.

kaver - Hi! Just wanted to let you know that I recently ordered cat shelves https://cats-mode.com/collections/cat-shelves from CatsMode, and I'm super impressed! The variety they offer is unmatched, and I found exactly what I was looking for. Plus, the prices were really reasonable. Definitely check them out if you're in need of some quality cat furniture!