I've checked out these T-shirts/sweatshirts for the first time and I really like them - they've got a great range of different styles and stylish logos etc. And no I'm not getting paid to say this!

I'm just quite surprised is all, and I'd like to get a couple.
My question is whether they'll all be for sale when I go to my concerts in Australia or whether only certain shirts are available at the concerts? Anyone else got a shirt at their concert?