Where can I find high-quality and durable cat trees?

I’m looking for good cat trees for my cat. I need two of them - one big and one small for different rooms in my home. Most of the ones I see on Amazon look cheap and not very strong. I’m ready to spend up to $400 for a well-made, durable cat tree that will last a long time. The problem is, I don’t know where to find one. Do you know if there are any high-quality options?