I'd be inclined to start from a download of the latest TR CS. This seems to put all available T-RackS processors into /Library/Audio/Plugin-/VST and just activates the ones you've purchased. I've only got CSR so deactivated the others from the Cubase Plug-In Information window as it was a bit annoying seeing them listed. I've attached another screenshot showing how they look on my Mac.
I'm pretty sure the old CSR plugins were named differently, without the T-RackS prefix - have you tried a Spotlight search?