hamann offers a carbon fiber kit.... but not in silver. regular black.
(click here to see it)

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BMW X5 3.0 si
Space Grey
Black Int.
Sports Package
(I want that Aero-Kit)
Custom Work... All me
H8 Artic White Nokya Angel Eyes
H11 Artic White Nokya Fog Lamps
Dark Smoked-Out Rear Lights
Dark Smoked-Out Top Brake Light
Dark Smoked-Out Side Markers
Blacked-Out Rear Reflectors
Blacked-Out Front Reflectors
Blacked-Out Mesh Grille