Just to throw a little more updated info in this thread, I have just purchased these scoop parts from Colonial Harley Davidson in Colonial Heights Virginia at the following prices on 04/06/2013:
Part Number Description Qty Price pre Tax
AN1005.3FSS SCREW, BSCS, 10-32X5/8, S 3.00 $2.03
M0851.7AA SCOOP, AIR, ENGINE, RIGHT 1.00 $30.40
M0852.7AA SCOOP, AIR, ENGINE, RIGHT 1.00 $25.38
These are all the parts I needed as I re used the original plastic shields bolts.
I have fitted this on my 08 XB12 and it fits like a dream (as you would hope for a factory part) plus as others mentioned it helps to keep the fan run to a minimum.