Ah. Pants.
If I remember rightly that year I was told it would be sent to me at booking, but didn't arrive. I did buy on something like the Tuesday before. Although they had a telephone number then! Progress.
I suppose worst case is you have to buy on gate, but I fancy your chances of sending the others back and/or saying they didn't come and getting your money back. Surely they would see they haven't been used.
Good luck.