Why would you want too ??
Also the hinges are different but i sopose that wont matter as Yell pointed out you would need to swap lids (Defender windscreen are taller.)
Just send it to me i could always do with a spare screen.
defender's look **** because we all no that the original def was in fact a wat the army called a series 4 witch is mainly nown as the STAGE1 so it also had the s3 windscreen bye bye bye bye