Roof Rack (bars) for a K12 3 door

With the 3 door the cross bars are very close together. Has anyone come up with a way to have the cross bars further apart?

I was thinking maybe to have a third cross bar at the rear, just resting on the rubber roof gutter, and this bar being attached in some way to the middle cross bar. Probably a case of welding a couple of lengths of square cross section tubing..

I really need a roof rack that uses most of the roof space...

Any ideas most welcome, thanks.
 
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