The problem is, I don’t know where I sent them. I do have a memory of doing the exchange. I also updated Blockfolio to get rid of my btg and bcc and add the eth.
With "Them" you are referring to the "bitcoin" half that you sold ( on an exchange, as you recall)?
If so, do you have the adress you send the bitcoins to? If you send them from your trezor, it should be noted somewhere there in your outgoing transactions. ( I assume you send them to an exchange to "exchange"/sell them there for ETH?)