Hi Phil,
In the movie ANH, the Stunt (background) troopers lenses were a green single strip, their are a few guy's on the forum who can help you out with new two piece lenses that will fit your MR lid.
If it's MRCE? Just remove the three retaining screw's per lense & install your new lenses & hey presto.
There has been some discusion in the past on the acurate color of hero helmet lenses, I'm sure someone else might want to add thier thought's on that matter I'm just replying to your green question
hope this helps