sash window top corner part to catch the channel balancer as you close the window

A quick learner from 92782 says:
The part that catches the channel balance as I close the window is broken. So it channel balance does not lower with the window.

The part is 1 1/4" long, 5/8" wide, and 9/16" deep.

The screw is 1" long.
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Paul from SWISCO responded:

Hello, I think our 18-012 will work as a replacement for top sash guide/ The dimensions are similar, but look it over to be sure you agree with our recommendation. 

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