I want to buy a set of pre made mounts/gaskets/hardware and then build my roof rack to those mounts, which would really just be drilling holes in the main bars to match the mounts. Anyone know of a roof rack manufacturer that sells like extra or replacement mounts for their roof racks that might work for me in this scenario? I tried looking around but didn't find much about this specific situation. Something like what's shown in these pictures, but this is on a 4Runner.