Brackets for Mirrored Bi-fold closet doors

The brackets in these pictures fit in the inside corners of the bifold doors and are designed to hold the rollers or hingepins. The weight of the mirrored door eventually breaks the plastic brackets. There are four on each panel, some at the pivoting hinge between the two doors that break from the weight. The brackets also serve to hold the frame together. I can find no identifying marks on the doors except for a sticker saying Arch Mirrors. Can't seem to identify that company or the door manufacturer. Need new corner brackets for these doors. Can you help? Thanks!

Dennis

Yes, that looks like the part, but the color is darker. Do you know if they make a stronger part or if this would be stronger that what I have? Three closets/three sets of doors that are breaking these brackets. What about 23-409? Would that be a stronger replacement?