Even if you can't or haven't OLCI'd for your ex-MLE departure (I'm not sure MLE is a port from where OLCI is possible), the lovely ladies at The Wing F lounge should be able to set you up with your ex-MLE Boarding Pass(es).

I've done this often enough for CMB turnarounds. If the first person you ask at the service desk says "no"; get them to ask someone who can do it.