You can buy up to 10,000 MQMs this month if you're willing to pay the price that DL is asking this year. You can also get a few MQMs from Hilton stays, although I'm not sure when this promo ends. Otherwise, you can either fly to earn the MQMs before the end of the year or take about 9,000 MQMs rollover and work on getting better than FO status next year. However, starting next year, DL is also imposing MQD requirements (money spent on DL where not everything counts) for all status levels.