Unfortunately, Nissan part numbers are different than the supplier part number on the lens.
What you can do is go find another D21, Pathfinder or Terrano down there in Brisbane AU and take pictures of its corner lights. Should be the same as the one you're holding.
Also, those lights will crack and shatter fairly easily, especially if you don't attach it using all the bolts (there's one that's actually important but that's a pain in the arse to get to, and most people skip it); even if you do mount it properly, they get hit a lot by rocks and idiots in parking lots. That's why there's a huge aftermarket in W/D21 corner lights. Before I put my brush guard on, I went through a set about every six months. High speeds need not be involved.
Edit: And if the lens actually cracked off, it should be trivial to match it up with the remainder on the suspect vehicle - as they're integral units not intended to come off, it'll have cracked off in a unique pattern.
Edit 2: Just added pics above.