You can get this information quickly (if, say, you want to find contacts you just recently created) with the OAuth 2 Playground.
Sign in here: https://developers.google.com/oauthplayground/
Use a GET URL like this to list your contacts starting with most recently modified:
You have to have the password of the accounts where you want to copy the contacts from.
Open gmail.com and log in with your new e-mail if not done already
Click on Settings (Gear wheel on the right), all settings, Accounts and Import \ Import mail and contacts
Put in the first e-mail you want to import contacts from and follow the wizard.
Repeat for all ...