Looking for Nylon Plastic Part Replacement for Center Drawer Glide

I am looking for the nylon plastic part that screws onto the aluminum center track of a drawer glide - original installed about 1970 in bathroom vanity. I cannot find manufacturer or part number. Plastic part has one "ear" broken off. Part is about 3/4 inch long x 1/2 inch wide and has one center screw attaching it to the draw underside track. The "Ears" engage i a "c" channel mounted on the cabinet frame at the bottom of the drawer opening. Ears are rounded and about 1/4 inch thick. Do you have this plastic part? Thanks.

This part worked just fine. Was a little larger-taller than the original but once screwed on to the end of the track on the underside of the drawer, it fit into the cabinet track and holds the drawer securely - thanks so much.