Accessing a former account
Apple does not delete closed iCloud (Apple ID / MobileMe / iTools) accounts without a significant effort by the documented owner of each account. It’s almost certain that the account remains active and available to log in.

You’ll have to review the options at http://iforgot.apple.com and decide to follow the normal account lock out procedure or to contact Apple support.

The accounts and storage are free so don’t assume the accounts is closed based on a long time since the last log in or that there was a quick “delete” button that got pressed “on the way out the door.”