Small plastic piece at base of ballast

A home owner from Melbourne, FL says:
small plastic piece at base of ballast is broken and will not allow the window to remain open when lifted.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
We can help replace this balance, though it will need to be a custom order. Before we can begin, could you show me a picture of an undamaged version of this balance? Seeing the one on the opposite side of the window would be ideal. I will also need to know the length of the metal channel and the stamp printed on it. Thanks!
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