Garrett
Watchdog
While CDP is currently uploading the patch 1.1 to their servers, they also offer all preorder and/or special edition DLCs for download, that is, *after* you mail them, they send you a d/l link. Not sure, why they don't just put them on their servers for public download and also not sure, if all downloads can be installed by all users or whether the game checks the legitimy...anyway, head your browser here for more information.
More information.
More information.