Can anyone suggest durable, but safe, toys for a cockatoo?

So, I’ve got a cockatoo. A sulpher crested cockatoo. He’s, uh, a little on the destructive side. The last ‘toy’ I got him was a swing. Two vertical chains filled with wooden balls and thin sheets of wood and a bell at the bottom of each chain. The support bar that went between them was pretty hefty.

Within 24 hours it was reduced to two chains, four balls, and one bell.

Does anyone know of something this fellow can chew on that might last, I don’t know, a week? Maybe? Safe for birds, etc.