Need bottom guide part to Sliding Closet Doors *(Plastic Piece that goes over the wheel)

Good morning. he manufacturer discontinued your roller and replaced it with our 23-041. One of the biggest differences between the old roller and our 23-041 is that it is no longer made with that plastic retainer in your first picture. The manufacturer deemed this was not a necessary design feature. I'm afraid there is no way to get that retainer by itself anymore.