Seems a little steep when a normal E85 wind deflector sells for about half the price, but it does include the brackets, and that all important logo.
I suppose if you need one, then you've got to pay !
(Nothing to do with me by the way)
https://www.ebay.co.uk/itm/BMW-Z4-ALPIN ... SwnTpbDUwc
Alpina Roadster Wind Deflector on ebay
Alpina Roadster Wind Deflector on ebay
Alpina Roadster S Lux #307