I was in a similar position, but I made my decision back in Mid-March. Everyone told me that I would be hard pressed to find a spot, but I did!
So, you never know what can happen.
I started by contacting every program east of the Mississippi and asking if they had any open spots. There is no central listing service of vacancies, so I just copied pages from the ACGME green book to get a list of all the Anesthesia residencies, and started making calls and sending emails.
Good luck to you
🙂