Tour hoodies

Are the tour hoodies an item that really sells out at every show? Last night in Dublin was one of the coldest shows I’ve ever been to, but I was prepared and wore a hoodie to the show. This definitely wasn’t the case with everyone else, and I was really sad that people were buying them because they NEEDED one and not because they WANTED one. It was at the top of what I wanted at the show yesterday and I got there when doors opened and they were ALL sold out at every stand by the time I got to the front of the line. Fortunately, I’m also gonna be in London and still really want one, so I just wanna know how early I should get there and if they really are limited and that high in demand at every show.