Robbie all good things take time mate.
With the front suspension, check and see if the actual coil is loose as this could be making that annoying sound (it may be only slightly loose but will cause noises especially on bumpy rough surface as it hits the mounts)
Not suing that is what it is but just check anyways
For the N1 boot spoiler try Just Jap they are cheaper than Unique Auto Sport IIRC