Broken window guide pieces

A home owner from North Hills, CA says:
July 13, 2019
Window won't stay open. Initially, I could open it to 3 different heights. Now it falls shut. The piece that should hold it open is broken. It is an old window. I would like to replace the part, if possible.
Photos are of the window, the track, the top of the track, the broken piece in the track, broken piece.
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Profile picture of Paul
Paul from SWISCO responded:
July 18, 2019

Your window guide looks like our 15-209 bracket. Look it over and see if this will work for you. 
Balance End Bracket
Balance End Bracket
15-209
$9.70
Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
GUIDE
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