Coil balance shoe, broken cam

A landlord from Jonesburg MO says:
I need help getting these replacement parts for our broken window sashes. the cams inside are shaped like a horseshoe and are broken to pieces.
User submitted picture of coil balance shoe.
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Paul from SWISCO responded:
Thanks for posting! For the coil balance shoe, please take a look at our 15-177. As for the coil spring itself, please look at our Series 152 and compare it to your own hardware.
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