need replacement pivot lock shoes...left and right.

A home owner from Fenton, Michigan says:
There are no markings on this part. It is broken into three pieces. The rest is still attached to the band (spring)? and has tension on it and is caught by the window stop.
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Emily from SWISCO responded:

Hello there!

We appreciate your patience during our busy holiday season. We don't sell an exact match for this part but our recommendation would be the 15-192 which is designed to use the Series 170 and Series 171 coil springs. Note, you may need to shave down the face of the shoe in order for it to fit in the window track. Take a look at the specifications and see what you think. 

SWISCO S170 and S171 Coil Balance Assembly
SWISCO S170 and S171 Coil Balance Assembly
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How to remove window pivot shoes
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