Was sent these images. Not sure if they are from the 1970s or 1980s.
The “A Plastic Bullet is a Solid Cylinder of PVC -It Smashes Heads” poster is particularly good.
During the troubles Fourteen people were killed by plastic bullet impacts, including nine children.
The Second Poster I got on Wikipedia when researching plastic bullets, it formed part of the Linen Hall Librarys Troubled Images exhibition.
“A Plastic Bullet is a Solid Cylinder of PVC -It Smashes Heads” poster and anti Plastic Bullet Badges October 23, 2010