PC content previously available at obliviondownloads.com is now available on a new store here

https://orders.gamesas.com/dlc/

Keep this in mind...

There are no refunds on digital content purchased on this site. All sales are final. Please note that this content will not be compatible with versions of Oblivion downloaded from Steam. Likewise, this content is not compatible with the Xbox 360 or PlayStation 3. Oblivion content for Xbox 360 is purchased via Xbox LIVE, while Shivering Isles can be purchased for PlayStation 3 on the PlayStation Store. For customer support, please contact us via email.