if you're on windows, you can try searching with qbittorrent's built in search

You can also find a lot of stuff in the Internet Archive, though download speeds are slooooooooow - https://archive.org/details/ps3-games-part-2

Vimm's lair has a bunch of games, too, but it limits downloads to 1 at a time, they're all self hosted.

You can also search for sites on Yandex.com, they still show pirate sites. Be sure to have uBlock Origin on your browser