Do I have to purchase a new window when 'white clip' is broken?

What is your question?

There is a white clip looking thing that appears to be attached to window (at the bottom left rear) and a silver looking track that the window sits in...question. Do I if the white clip is broken have to buy a whole new window? Or is there somewhere I can order that part from? Repair place wants me to pay over $530 to replace regulator/ w motor $242 and also found $200 window with clip intact used +labor. I feel like because I am a woman I am getting ripped off!!!!