try this german dealer he has almost all kinds of looms you might think of,, i got my E53 from him...
BMW Nachrüst-Kabelbaum TV Funktion für alle E46 und E39 bei eBay.de: Einbau-Navigationssysteme (endet 12.04.09 21:00:00 MESZ)

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2008 BMW X5 4.8i
Navigation
Bluetooth
Rear Entertainment
Aerodynamic kit
DVD, CD, TV
Projection