Oracle Database 11g Release 2 (18.104.22.168) is available in the latest media pack as patch set.
To download the software from My Oracle Support:
Log on to My Oracle Support.
Click Patches & Updates.
In the Patch Search section, click the Search tab.
Enter 10404530 in the patch number field.
Select a platform to download.
In the Patch Search Results page, under Patch Name, click the patch number to display the patch details.
From the File Download window, click each file name to download the selected software.
Refer the readme document to get which zip file corresponds to which installation Type.