Does anybody managed to find roof bars that fit MK4 and are safe to use with a big roofbox or bike mounts? I know that there are Seat genuine bars 6JA071151 but they're rather expensive. The cheapest I could find on ebay cost £127 + postage but I wonder if it's worth to spend that much. On the other hand I worry that non-genuine may not work as expected. Any thoughts? Thanks.