It is inside MOS/Metalink now (https://support.oracle.com).
Moreover, the recommended installation procedure has changed. The download will be a full version and you are supposed to install it on a different ORACLE_HOME, then upgrade the databases.
Download 126.96.36.199 from My Oracle Support, then install it in a separate ORACLE_HOME (it is a full install). Then follow the steps in the Upgrade Guide
Important Changes to Oracle Database Patch Sets Starting With 188.8.131.52 [ID 1189783.1]
Complete checklist for out-of-place manual upgrade from previous 11.2.0.N version to the latest 11.2.0.N patchset. [ID 1276368.1]
-- The 184.108.40.206 and later patchsets are a full release.
-- The 11.2 Patchset Installer does not update existing 11.2 installations.
-- The install process performs a new installation whether you are doing out-of-place upgrade or in-place upgrade.
-- Refer Metalink ID-1276368.1
I know you're probably finished with your upgrade, but personally, I get tired of people saying "all you have to do is...". My upgrade included the grid infrastructure, which was a problem. The issue seems to be that the Oracle roadmap is difficult to piece together for us, "experienced" RAC DBAs.
First read "Things to Consider Before Upgrading to 220.127.116.11 Grid Infrastructure/ASM [ID 1363369.1]"
The amazing thing is that you can't find references to this doc, by searching. I had to open a severity 1 ticket, because my cluster was in ashes. I was assigned a resource from the Oracle RAC team, that truly saved the day.
1. Make sure your prereqs are done. For me it was "NOTE: “Or PATCH 9706490 if on AIX, Solaris or HP”"
2. Don't rely on 'sudo' for your root work. ALWAYS have a pound prompt.
3. Backup everything.