To the best of my understanding, the only legitimate source of patches is by means of a MOS logon.
If that patch level is indeed not installed, you may be able to get the equivalent revision level by doing what might be considered an over-the-top upgrade to your Solaris environment. Install a newer Solaris 10.
In the mean time, what do you see if you do a:
<pre>showrev -p | grep 118833</pre>
... not sure but there may be differing output for that command as root user versus non-root user.