Hi Steve,
Only available inside the gates for the 4 days the Magic Round ran. They were TLA produced but paid for by Telstra as their promo.
128 cards in the set (8 per team) and the packets available on each day were for the teams playing.
The packets themselves were clear and either contained 4 or 5 cards.
There are 29 sealed packets in a complete set.
There are a few other threads on here that are related. I believe
@Angry (Paul) went each day and managed to get a few spares to send off to team collectors.