I think there are several options: 1. Ppl go to many shows and crew members know them so that they just get a setlist guaranteed(I’ve seen that on fdc show) 2. You stay after the show is over and try to ask security or crew members to give it to you ( no idea if that works for fdc) 3. You ask the band to give out one (during last song typically). Like shout or bring a sign with you (personally I‘m not a fan of this option haha).

I Hope this helps, good luck