In Melbourne there is a mobile syringe exchange program.. you just call them and they drive to your door and they'll give you as many as you want (including a 100 box) - it is a free service, too. They normally drive a couple doors down and just give you a discretish package to take back inside.. They normally take anywhere from 30min to a couple of hours, so best get more before you run out.. It's weird, I've been IV'n drugs for over 10 years and I always knew about them, but for some reason I always got mine off either foot-patrol in the CBD, otherwise from an Exchange.. it's only the last 12 months or so, I just get them all home delivered.