I can't help with the cruise as ours is in October, however by my calculations you still have 3 more days to try for a cruise of your own.
My advice...do NOT go through Member Services for the Illuminations Cruise. Call (407) WDW-PLAY instead. I would recommend familiarizing yourself with the voice mail menu before your actual call. I usually call about 15 minutes before they open (the open at 7am) to see which buttons I will need to press, etc. Then, at about 6:58 I start dialing. You can press the necessary buttons immediately, rather than waiting for the whole spiel, and by listening to the first second or two of the final spiel you will be able to tell if the office is open. I keep doing this until I get through and it has worked well. Also, if you are placed on hold do NOT hang up. For our Oct. cruise I was placed on hold and figured I had no chance. I decided to hang on anyway and was thrilled when the reservation CM told me there was one cruise left!
Good luck!