Lostbok not sure if this is any use to you. It is a list of part numbers I got in February for the s-line bits. My car is a 3 litre sport avant, but it should give you a good starting point if you go into a dealer.
8EO 807 110 B GRU front lower "spoiler" primed £72.95
8EO 807 647 D 01C "air guide grill" (front centre lower grill) £65.53
8EO 807 682 C 01C "air guide grill" (fog light grill) 6 cylinder + diesel £13.67
8EO 807 681 C 01C "air guide grill" (fog light grill) 6 cylinder + diesel £13.67
8EO 853 959 C 7DL "cover for door" (lower door trim) grey left front £62.36
8EO 853 960 C 7DL "cover for door" (lower door trim) grey right front £62.36
8EO 853 969 D 7DL "cover for door" (lower door trim) grey left rear £62.36
8EO 853 970 D 7DL "cover for door" (lower door trim) grey right rear £62.36
8E9 807 521 G GRU rear lower "spoiler" primed (2 cut outs for exhaust) £118.17
All these prices are plus VAT. You should be able to squeeze a discount from your dealer.