I was putting away my washing today and seeing my Ooook T-shirt prompted me to suggest the following:
Can we try to arrange to have t-shirts available at the Con? I’d recommend that members can pre-order and pay via the website, and then we get printing done so that the shirts can be ready and handed out at the Convention. The cut-off date for ordering will have to be a firm one based on how long it takes to get the shirts printed – and there’s no guarantee you’ll get one if you don’t preorder.
Of course, perhaps a handful of extras could be ordered to bring each size up to a round number – but not too many – and this will allow people who can’t plan ahead at least the slim chance of grabbing one at the Con itself.