Spring balance for 15 year old Boreal tilt window needed

A home owner from Central Massachusetts says:
September 12, 2016
The spring balance is about 1 1/4 inches wide by 2 1/2 long and 1/2 wide. The metal piece that pivots breaks over time with use. If that part could be purchased the spring balance would be fine. It mounts to window with a screw that goes through a piece of plastic that fits in the center of the spring. If I can find a replacement part I would like to replace between 10-20 balances.
User submitted image of their window hardware.
Profile picture of Tom
Tom from SWISCO responded:
September 14, 2016
Hello! Please see our 15-175 pivot shoe, this looks to be a match for what you have. I'm afraid the metal cams are not available separately.
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