I would be willing for him to send me his seeds and password and I can sign and broadcast a transaction sending the coins from this address to another address of his choosing.
If you do this, will you post a full HOWTO? It's ridiculous Coinbase killed this service, but it would be nice for future reference, even many years from now.
Obviously any sensitive data being sent will need to be encrypted first, which will pose another challenge.
I've used this for seed phrases for my Fork claiming service:
Don't send private keys from a standard email that doesn't encrypt messages.
The easiest way to send private keys (or seed words, depending on your wallet) is if you
create a
Protonmail account.
~
This way, the email has end-to-end encryption and should be secure. There's of course always the risk of your (or my) computer being compromised.
Alternatively, you can send half of each private key to my Protonmail email, and the other half by Bitcointalk PM. This way the parts don't end up on the same email account.