Self-contained coil replacements?

A quick learner from Hawaii says:
I am looking for a double coil assembly that I can use to replace the springs in my Simonton single hung windows.
I would like to just unscrew the old one and screw in the new coil balances, so I'd like the supports and accessories to all be included.
Do you have that part?
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Paul from SWISCO responded:
We might have what you need, but Simonton used many different coil balance systems. Can we see some pictures of yours to start with? Specifically, I'd like to see your springs and your pivot shoe.
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