Bloody hell, I thought you lot were supposed to know stuff .

The 2wd boot lid and 4x4 are different, as the cut out for the 4x4 lock is different shape to the 2wd. The good news is that you can modify the 2wd one to accept the 4x4 flat lock, as this is what I did on mine (as the 2wd lock has a propensity for sticking in the barrel, which means that sometime the central locking doesn't lock the boot if the push catch is not in it's fully extended (oh er ) position).

You can also retro fit the remote boot release and filler cap from a 4x4, as the 2wd shell even has the fittings beside the driver's seat to accept the release mechanism.