Anyone here have the crossmembers for the top?

cross members? you want to do a roof rack? is your model 2008?

Mopar calls them Dodge Nitro Roof Crossbars.

Yes I installed these on my 2007 Nitro and found them "On-Line" at Affordable Parts and Accessories wholesale to the public. (Hendrick Chrysler Jeep - Home Page - New & Used Chrysler Dealer Showroom At 543 N. McPherson Church Road, Fayetteville, North Carolina (NC) 28304 )with the best price due to their low shipping cost. Things might have changed but I was impressed that they called me at home when I questioned their total price delivered by e-mail.

2007 Black, mounts to production side rails, Includes T-slots for carrier installation. 82210062

http://www.moparsupercenter.com/pdfs/82210062.pdf

Not sure what is different with the 2008 accessory but they are more expensive. They look the same to me.

2008 Black, mounts to production side rails, Includes T-slots for carrier installation. 82211487

Mopar OEM Dodge Nitro Production Style Cross Rails 08-Up - AutoTruckToys.com

__________________
Rick

Nitro Year: 2007 (July 07 Build Date)
Nitro Model: R/T
Nitro Drivetrain: 4x4
Nitro Color: Stone White
Fully-Equipped w/all factory options