It's 15" long but there are not a lot of choices. OE BMW or the Bosch A380H is what I found. Valeo, the OEM, might have an aftermarket line but I didn't find one.

I have the Bosch A380H in the rear and Bosch Icon 24OE and 20OE in the front. They're nice.

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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim