Welcome to owning a 2012+ Focus.
Unfortunately, it seems the strut bearing issues (both the clunk and the grind) are inherent with the platform...
I was the one to use ST front struts, ST strut mounts, new bearings, I used a prolific amount of white lithium grease on all contact points, and I altered the torque specs a bit. I also have Eibach Pro Kit springs installed, and I paired the ST struts with Koni Yellow rear dampers for the Mazdaspeed3. I don't recommend going this way unless you are after a very firm ride (I prefer it, myself). It's a performance-enhancing fix (so far).
My front suspension has loosened up a bit after the initial install, but the clunk is basically gone.
Joined the dark side.