plastic clips for passenger windows on 1999 Pontiac Grand Am

Where can i buy just the plastic clips that hold the window on the track cable? Is there a particluar pn for this to look for? Mine broke into several pcs ans are such bad condition that i can not even tell what i should be buying as equivalent.

2 answers
they're called SASH CLIPS and I bought mine at O'Reilly's Auto Parts for $4.
I would try dealer parts for this and then window replacement shops after that.