23-215 Plastic

I have mirrored sliding closet doors in the bedrooms of my home and on one door the bottom guide is no longer functioning due to the plastic pieces having disappeared. My kids claim to not know how this happened but I have my doubts. Anyway, I have identified the assembly as 23-215. Is there any way to purchase only the plastic pieces by themselves and not the whole assembly? It seems like a waste of resources to get the metal bracket as well when it is just going to go straight to recycle.