Yeah, the CFOA events are usaully posted on APPA individually one at a time by the CFOA. When you sign-in at the events each player on your team will sign stating you are that person and that is your APPA number.
Sorry I missed your post. There is no cost to get an APPA number. Division 5 and 6 players do not need to purchase cards for OUR series but you will need the card if you go to the Championship in Rock Hill in November.