If you're having trouble finding the Endor DLC on Google, you can try the following alternative methods:
Launch the game, navigate to the Campaign menu, and select Bonus Mission to begin the Endor level immediately. Method 2: The Steam Unlocking Patch
Until an official remaster or re-release occurs, the Endor DLC remains a phantom limb of the PC gaming library—a piece of content that exists, but is perpetually out of reach for the average consumer.