RB, I got it from Gault BMW in NY in Feb.
I also found it online at a few other stores (Ecs tuning etc...) let me have a quick looksie for you.

OK WOW, so I can't find any skid plates anymore on the sites I found 4 months ago.
BUT try to contact Charlie Spear at Gault BMW in Endicott, NY @ (1-855-300-9578 or 1-607-321-0023) and ask for the part (82-11-0-021-339). He may have more.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S