This is a plastic piece nailed to the bottom of the dresser drawer to help the drawer slide. Since PA house furniture is no longer in production, maybe you can help us find this small part.
Dave Sr. from SWISCO responded:
August 11, 2019
We do not offer an exact match. However, we feel you could use either the 32-117 flat tack glide or the 32-083 corner glide, you would just have to modify it by cutting off the vertical piece. Look both parts over and see what you think.