I have found most of the things I want through a combination of piratebay and 1337x for torrents, soulseek, librevox for old stuff and a library app. I have then mirrored what I have got via torrents up on to soulseek.

I have recently been using the scribd free trial so might be worth checking there, they do a 30 day free trial then when you go to cancel the sub they will offer an additional 30 days free too.

I absolutely do where I can but when a lot of stuff gets released within the scene I am into on a dead inferior format (vinyl) exclusively then I am absolutely going to pirate that shit if I can.