I started a pretty new thread on this also as I have just got an 03 2.0FSI that I want to facelift to the 8P2 s-line! Ebay is your best bet for the bumper, its just a case of being patient and being pretty eagled eyed for a good priced on to come up, I just got one last night for £95 including s-line grill and i think it may also include the fogs, although we shall wait and see as its getting delivered tomorrow, WHOOP!
If not I think member Lee_R mentioned on my thread that he is selling his s-line one piece grill soon, so may be worth dropping him an email!