I have mine in at the dealer now for the 4th time for the same issue... I had the left sway bar bushing replaced first, clunking still there... took it back in, they replaced the front left strut, clunking still there, took it back, had them test drive it, they heard the sound, then said they replicated it on another Commander they test drove, so they said 'that's how they are'.
Took it to a different dealer today, they said there is something wrong with the actual sway bar, not just the bushing, and claim they have fixed it. I should be able to pick it up tomorrow...