Think I might have sorted this -:
51 12 7 046 919/20 - rear support bumper trims
51 71 7 051 035/6 - Flared wheel arches - rear
51 71 7 051 037/8 - Flared wheel arches - front
51 11 7 073 517 - Mounting parts kit

Plus a few rivets.
Ebay had 2 sets 4 sale - with & without running boards but he was using same part numbers for both.

Cheers

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X5 4.4i 2006 sports package, Titanium silver, Sports exhaust with Xpipe, Limo tint, 20" wheels 168's (Black), 25mm H&R wheel spacers& arch flares all round - Loud........

Work in progress -:
Replace BMW Ipod system with DICE - installed but no sound yet??