Creative ideas on ladder rack for Dodge Xplorer

Does the van roof have rain gutters? Most van racks clamp onto the gutter rails.

How rounded is the roof? Most van racks are either spaced up, or curved/angled up, to clear the roof, since the gutters are lower than the center of the roof.

It wouldn't be hard to extend the legs of an existing rack to give it more height to clear a more rounded than standard van roof...