There have been AZBers who were unable to go who sold or donated tickets before. You might try asking again in November in case someone has a later change of plans.
If you have no luck here you could make a sign and stand by the entrance on Tuesday and Wednesday nights prior to the start of play in case someone had a change of plan and couldn't use their Thursday tickets. I have never noticed scalpers at Mosconi Cups.
It's amazing that they are already sold out for Thursday. I see the VIP tickets (including unlimited wine and beer!) are also sold out for Thursday at $200 each. The new venue (Alexandra Palace) has almost 2000 seats.