I think all of these are available on piratebay. When I was into sound production, I found lots of high quality dumps there. There's way more than 16k floating around on piratebay, more like 500k+. And the quality of some of them is amazing.

Never used 'em for commercial applications, obviously, because hobby. But it's a lot of fun remixing them.

Another interesting source of sound effects are pirated games. Last of Us in particular has wonderful, stunning, horrifying sound effects, example of which I wish I'd saved.