@
Brage
I used to work for a rack/hitch installer and we had done some "track fill" style installs by Rhino Rack. This removes the stuff in the "gutter" and puts in a track that sits relatively flush with the roof-line so when/if you take the towers off you don't see tehm.
I can't find the custom tracks on their website unfortunately.
http://www.rhinorack.com/en-us/products/roof/roof-racks
They have a number listed so call them: 877 744 6622