Problem scenario
Is there a non-custodial exchange that allows you to exchange Arbitrum coins with a Trezor wallet?
Solution
Yes. There are at least three: stealthex.io, Exchang.io and changenow.io.
Warning: Trezor does not natively support Arbitrum. Therefore you would have to import your wallet to something like MetaMask. You would have to give another party your recovery seed. You may not want to use Arbitrum with Trezor if you do not want to give your recovery seed to someone else (e.g., a software wallet application).