If you are looking for a "solid report" on how to get the full version for PC now, here are your remaining options:

You can search for original physical DVD copies on second-hand marketplaces.

: You can check sites like DLCompare or GG.deals to see if any Steam keys are still floating around.

While the game is no longer on official stores, some third-party key resellers may still have leftover stock.

: You may still find a trial version available for download, though this is not the full game.