I may be interested, what's the adjust-ability on the width for the gutter mounts, and what's the height from the gutter mounting surface to the bottom of the bars?
The bars are currently set to about 52.25" wide but could go out to at least 55" full width of the bars if not slightly wider. Height from gutter mount surface to bottom of bar is adjustable from 4.75" to 6.5". I can provide you with some pictures of the mounts if you want.
I will measure tomorrow to see if these fit, I'm trying to avoid removing the factory rails but may have to no matter which rails I pick up. Just out of curiosity, is there any specific gear you may be in need of?