If you're having trouble finding a wagon one specifically, From my experience (i've got a wagon rear bumper on my EK) the outer/corner sections are all the same, just the centre section has different holes for the wagon overriders
'The best engine in the world is a vagina. It can be started with only one finger. It is self-lubricating. It takes any size piston. And it changes it's own oil every four weeks. It is a pity that the management system is so f*$king temperamental.'