I don't have an AIX around, but I find it super weird that when you install OBIEE 11.1.1.7 you get the client of 11.1.1.9 inside, mainly because 11.1.1.9 didn't existed when the installer of 11.1.1.7 was created ....

As 11.1.1.7 is old only 11.1.1.9 is available on the site online.

Don't you maybe have multiple catalog manager installed in your system and so you keep opening the wrong one?

Because except if somebody at Oracle took a timemachine back in 2013 when they were packaging the installer of 11.1.1.7 to go forward to mid 2014 to take the client installer of .9 and bring it back to 2013 and package inside your installer I hardly see how is it possible.

If you really don't have the right version of the client the only place online crossing my mind would be to take a old Sample App (OBIEE Samples ) matching your version and there inside you will have the client installer.