Look for well-known repack groups. While I cannot provide direct pirate links, the general consensus in the retro gaming community points to archives like or trusted repackers such as FitGirl Repacks (though she focuses on newer titles) or RG Mechanics (legacy releases). Always check the comment section before downloading any file.
Furthermore, the original physical CDs are out of production. You cannot buy this digitally on Steam or Origin. Therefore, the only way to play is via abandonware or ISO distributors. This is why versions have become the standard. Look for well-known repack groups