Could be worth putting this to the club. I'm going to have a guess that the number of people who are a centenary member but not a season ticket holder is quite low and the number of people who meet all the following criteria (centenary member, not season ticket holder, want to go to Wembley, not getting booked as part of a season ticket holders group, not willing to wait till Thursday) will be even lower, a tiny number in reality I would imagine. With that in mind could the club not allow these supporters to purchase tickets from the club directly? They could go into the box office, prove their eligibility and then the club would use the ticketmaster website to book the tickets. Alternatively the club could allow any centenary member to contact them with their membership details and be given a code by the club which would then be entered into the ticketmaster system Oh and maybe the club should issue something simiar to season passes to centenary members for future use