They might have sold out by now - I haven't checked...
You can order one and pay for one, even if you are not going yourself - all you get is an order reference number. You will only need this to collect one or let someone collect one - nothing else.
If you'd like to try, try it - I could pick it up for you and send it (BUT Royal Mail is not cheap unfortunately) - just pm me if it worked.
I just know we did not have a lot left this morning - so they might all be gone by now.