i found this googling -
Did you know that Walker has a kit and two parts that could be used to repair a broken catcher? Kit# 8515-9 goes between the catcher and the catcher support frame. Part# 8515-13 goes on the left and part# 8515-14 goes on the right. These parts and kit sandwich the lower frontend of the catcher and reinforces it along with the lift handles to help secure the plastic.