Certainteed double coil constant force balance system

A home owner from Skowhegan Maine says:
August 14, 2018
I have Certainteed double hung replacement windows in my house. Recently, this balance system broke. Looking from the inside, the device is on the left side top window. The number ?632? is etched into each coil and they are 1/2? wide. The only information that I found in the windows is: Duralite Tm L9, followed by the number. 081909 1023 (those 1?s might be 7?s) also 08/2009 was on the upper right of the bottom sash. I hope that this is enough information. Thanks for your help in advance!
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Tom from SWISCO responded:
August 21, 2018

Thanks for posting. Is the shoe the only part of the balance system that's broken? If so, I recommend our 15-180. You could likely re-use the rest, assuming they're in working condition. If you did need to replace everything else, let me know.
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Tom from SWISCO responded:
August 21, 2018

Yes, we do sell the part. It's the 15-180 that I mentioned and linked in my last post. You can place your order for the part through our website.
A home owner from Skowhegan Maine says:
August 21, 2018
Hi Tom, thanks for your response. Yes, the shoe is the only part that is broken. Do you folks carry the part that I need? And, if so, how can I go about ordering a couple for each side? I assume that since one shoe broke and all my windows are the same age, I can expect others will break. So, I would like to have a couple of spares on hand. Thanks in advance for your response.
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
Double Support Detent Clip
Double Support Detent Clip
15-181
$6.17
640 S190 Coil Balance Spring
640 S190 Coil Balance Spring
S190-640
$9.74
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