Spring End, Window will not stay up

A home owner from Pennsylvania says:
I am looking for a part that connects onto the spring for my window. The hook end has snapped off and the window will no longer stay up because spring cannot be attached. You can see from the photo that the piece above is broken off. I believe it is an old anderson window from some of the markings that are inside panes.
User submitted a photo of friction shoe.
Profile picture of Paul
Paul from SWISCO responded:
This looks like a friction shoe for an old wood window jamb liner balance system. See our 15-104, this may be a possible replacement.
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