Zillon, do you have steel lower control arms?
I wonder if this is a similar situation to the lower control arm difference on different wheel configurations. I recently read in another thread that some Foci with smaller wheels have a "steel" lower control arm and others have alloy. I think the larger "alloy wheel" models have the alloy control arm.
I do not have the clunks.
Here's my March 2011 built SEL Hatch with premium package (17" mesh alloy wheels)
Drivers side Lower control arm (alloy)