I forgot about USENET. I haven't used the USENET since my ISP severely limited access to it. Ok, so there are two options: P2P and USENET. However, I think what he wants is a magical web site full of 700MB pirated images for free download (good luck with that).
Umm I don't thyink that a half life ISO would be considered "pirate" it was never released so it can't really be pirate.
Correct me if I'm wrong.