After buying a Ledger Nano, a friend of mine helped me unlock 5 individual ERC-20 Token addresses within MyEtherWallet. I can now store various alt coins within these 5 addresses/wallets using the Ledger Nano as access.

However, I realised that if I lost my Ledger Nano I don't have the SEED/security keys for the 5 MyEtherWallet addresses - is there a way to access this so I can make a note of it?