I was thinking the same thing. Maybe you could use a couple mighty mounts to secure it to the front rack bar? My main concern would be preventing it from flying off at speed (it mounts with body kit double stick tape doesn't it?) so anchoring it to the roof bar seems like the logical choice. Would just have to figure out how to do it in such a way as to still allow cargo boxes/racks to be attached to the bars.
Things that make you go hmmm...