Clip to hold window balance

A handy person from Phoenix, az says:
This clip screws on to the top of the window balance and keeps the balance moving with the window when the window goes down.

This is on an aluminum, non-tilt window.

I would appreciate any help in identifying it and getting one.

Thanx...john
User submitted photos of a top sash guide.
Profile picture of Paul
Paul from SWISCO responded:
Please see our 18-009 top sash guide. This looks a lot like yours, but compare our measurements to yours to confirm.
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