You can create a new admin token for yourself.
Click My Services - then click Manage Service on the service you wish to create a key for ....
Select "Tokens" from the menu on the left.
Now you can create a new token (privilege key) for any group. After you submit you may have to click "tokens" again to view the newly created token.
You can also lodge a support ticket to request a new ServerAdmin token, but make sure you use the same account/login that pays the invoices to prove you are the owner, or the token will not be issued.