Public trackers like the piratebay face a lot of issues with retention. If it’s not mainstream or recent people often don’t seed or maintain it. If you join a private tracker there’s ones dedicated to keeping older sources like that a live!
For really obscure content, internet archive, your library, usenet or even eBay are the go to!
For really obscure content, internet archive, your library, usenet or even eBay are the go to!