A handy person from Rockland, Ontario, Canada says:
May 24, 2020
It is a plastic part that holds the front part of the drawer (from the side)
Bob from SWISCO responded:
May 27, 2020
I am afraid we don't have a part quite like this. If it's a spacer you need though, you could see if you could use something like our 32-334, 32-352B, or 32-339 as a replacement. Look them over and see what you think.