[Baffler]

Ideally you'd need to have the car raised on a four poster lift, with the suspension in its neutral state, then go around the various components with a pry bar.

I still think it's the NS steering rack bracket that has separated. If I were you I'd fit a couple of heavy duty cable ties or a small ratchet strap over the top of the steering rack and around the subframe so as to pull the rack against said bracket then test drive the car to see if the noise has gone.