need 2 right side coil spring balances for single unit window

A contractor from Fort Mill, SC says:
May 18, 2017
We are in need of 2 right side coil spring balances for the windows in the above pictures. We have been told that the manufacturer is Alenco Windows. We know that windows are 34" wide and 30" tall (58" tall is both top and bottom together).
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
May 23, 2017
Please see our 15-180 shoe and Series 190 coil balance. I think you'll find these parts match what you have quite closely.
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
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