most fj40's come with a swing away spare tire carrier. Some I have seen come mounted on the drivers side, some on the passenger side. I was wondering, can these be reversed and work both ways? That is, if you have a drivers side mount, could it be put on the passenger side or vice versa? or is there a specific drivers side and a specific passenger side model? the reason I ask is I was wondering about taking one of these spare tire cariers and welding onto it my own luggage rack/ice cooler design using a stock fj40 swing arm to be able to still get to the rear. so, if you had a drivers side mounted spare do you have to get some specific model fj40 passenger side spare swing arm, or can you get another drivers side and reverse the hardware and mount it to the passenger side?