Swap Sliding Door

[Jake]

Hi there,
I am hoping to swap a sliding door on my Mk2 2003 Berlingo which is damaged on the outside. I have seen a post about removing and refitting a door with a download pdf that looks very useful.
My problem is the 2nd hand replacement door I have acquired is from a slightly different (newer?) model. I think they redesigned the handle mechanism at some point so for example the interior handle is below the window on the newer model. The metal shell looks exactly the same shape so I'm thinking that I can swap all the mechanism from my old door onto the new door - although it looks like I'll have to drill a couple of holes in the shell to screw bits on which aren't on the new model.
If anyone has any tips I'd be grateful.
Cheers,
Jake
[edit - adding more info below]
PS. I'm attaching pics as I have now got the doors side by side with the trim off. I think there's a problem because the new door doesn't have the bottom rail mechanism with it and I think it has a different system for holding the door in open position - not the hook with a cable attached as with the old. I can't swap all the mechanics over because some of it is riveted in place.
Old Door 1
   

Old Door 2
   

New Door 1
   

New Door 2