So we may guess that the air vent slats are not available separately, but that you got to get the
"set of covers" kit (part # 51 11 8 053 877).
Though, judging by the pictures, the parts feature the following part # stamped on it:
- 51 12 8 052 497 ("L" = right hand side)
- 51 12 8 052 498 ("R" = right hand side)
