H2 roof rack for H3

I saw an H3 on the road the other day with a stock H2 roof rack mounted on top.  The H2 roof rack really gave the top of the H3 a tough look as appossed to the standard roof rack on the H3 (which is a little on the "lightweight" side).  Anyone have an idea how this was done....will a stock H2 roof rack fit on an H3 without additional hardware?

Do you know how it was secured? May have been on the roof rail crossbars, so it would basically be a universal mount.

I've looked at the bottom of the H2 roof crossbars and there are two j-shaped hooks one with a set height and the other one is tightened with the big knob. I think the width is too long as an H2 is wider than an H3.  I think it will fit with some customizing.  Do a google search for a light bar called the Delta 6X.
 
I found this picture on the net...

Got no idea, but an interesting idea none the less.

The H2 is 6" wider so it stands to reason that the roof rack must be wider than the H3's roof rack.  I like the look of it but you'll have to modify the H2's rack to fit.