I'm not necessarily even talking about piracy. The BitTorrent platform already allows you to legitimately sell files I believe, so that could be one way if enough artists/labels get involved. Thom Yorke already tried it out some years ago.
I have no clue how big SLSK actually is but I can tell you you can find pretty much anything on there in lossless quality + artwork, etc. if you're willing to dig a little bit. That would be another way, even as a last resort.