I am having a hardtime looking for essbase and planning knowledge modules using odi.
Here are the links.

The particular PRODUCT PACK for:

Oracle Data Integrator Adapter for Hyperion Planning Release 9.3.1.1 Installation files
Oracle Data Integrator Knowledge Module for Essbase Release 9.3.1.1 Installation files

for Oracle Data Integrator Knowledge Module for Essbase Release 9.3.1.1 Installation files:

* Go to E-Delivery, http://edelivery.oracle.com, and login by providing the requested information.
* On the search page, select the following from the drop down menus:
o Select a Product Pack = Oracle Fusion Middleware
o Platform = select appropriate platform e.g. Microsoft Windows (32-but)
* On the search results page, scroll down and click on the Oracle® Application Server 10g Release 3 (10.1.3) Media Pack for Microsoft Windows (32-bit) link.
* Scroll down to:

*then planning module can also be found on that same page.
gudluck and Cheers!