Chew-safe bridges/enrichment.

Hello! I'm doing some Christmas shopping for my chinchillas and thought it would be a good idea to add some more enrichment to their cages w/ a bridge, playground, or tunnel. I found several ADORABLE bridges but none of them listed the type of wood they were made with! I did find a couple made with chew-safe apple wood, but they all seemed mostly geared towards hamsters :/
I'm looking for help on how to contact manufacturers/find safe toys.
Any ideas?