That's a rough one. The easy/ lazy way has returned to bite you in the ass. Out of curiosity, where did this idea come from? If you haven't figured it out yet (although I'm sure you have), it was a terrible one.
Chalk it up to lesson learned, and like others have said, your best bet is through someone in your operations control. The only problem I see is you're now creating a ton of work for someone else to fix your mistake. If you're successful in getting the information, be certain to thank the person that helps you out. Probably wouldn't hurt to send a gift of some sort to show your appreciation.
If nothing else, you now have an excellent 'live and learn/ TMAAT' story for an interview! Best of luck!