You can find the CA TDM MF toolkit XMIT files in the support.ca.com, under your site_id (if you have purchased or been given access).
Below is how the entries would look like:
Notice that version 5.4 service pak 7 is the latest version. This link will take you to the following location:
Here you will have the XMIT packages, as well as the Windows packages for the file definition manager and the conversion utilities.
The installation instructions are available at this location:
Mainframe Installation and Upgrade - CA Test Data Manager - 4.5 - CA Technologies Documentation
Thanks
-Walter