Same here. My exam in Schaumburg was rescheduled to January 7th in Minnesota too. I have checked other locations in IL, including Peoria and Springfield, and there is nothing available in December! I called CAS, and they let me send email to firstname.lastname@example.org, and provide your exam info.
This is on CAS website (COVID-19 EXAM RESCHEDULING PROCEDURE):
“The CAS will work with affected candidates to reschedule the exam for the first available date within the exam window of November 19 to December 9, 2020, in accordance with Pearson guidelines. If the first available testing date is outside of the current exam window, the exam window will be extended until December 31, 2020. The 2020 fall exam sitting will conclude on that day. If the candidate is unable to reschedule the exam prior to December 31, 2020, the exam registration will be refunded.”