broken window part

A quick learner from California says:
These are Milgard double hung windows installed in approximately 2002. The first picture is of the lower window part which is still functioning properly. The second picture is the upper window where the piece has cracked. I'm not sure how to identify the proper part I need. Thank You.
Thumbnail of the uploaded file named PXL_20201124_202244534.jpg
Thumbnail of the uploaded file named PXL_20201124_204119472.jpg
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Tom from SWISCO responded:

Hello! The part you need is called a pivot shoe. The biggest clue you gave me here is that black piece, which is a match for our 15-225 Tamp-R-Lok. This piece is designed to be used with either the 15-231 (natural) or 15-210 (black) pivot shoe. Look these two parts over and let me know what you think.

15-210 : Corner Locking Pivot Carrier, Black
Corner Locking Pivot Carrier, Black
15-210
$2.67
VIEW >
15-225 : Tamp-R-Lok III
Tamp-R-Lok III
15-225
$0.48
VIEW >
15-231 : Corner Locking Pivot Carrier, Natural
Corner Locking Pivot Carrier, Natural
15-231
$2.67
VIEW >
How to Remove a Pivot Shoe (Cutout Method)
How to Remove a Pivot Shoe (Cutout Method)
VIDEO
WATCH >
How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
WATCH >
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
WATCH >
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