In search of Certainteed-Insulate Vinyl Window Spring Balancers

A quick learner from Lake Stevens, WA says:
I am in search of four spring balancers for two Certainteed-Insulate vinyl windows. I found that the two windows have no balancers at all, so I don't have a number.

The windows are single hung, white vinyl windows.
I believe the windows were probably manufactured in early 2008 or possibly late 2007.

The sash measures 26 7/8" wide X 23 3/4" tall.
The entire window frame measures 28" wide X 45 7/8 tall.

I have attached photos to this email that may help.

Thank you for your help!
Best regards,
User submitted photos of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting, Kevin. It's tough to say what balance you will need. The only way to know what you have is by comparing physical details, so without an original to use as reference it's next to impossible to guarantee a match. Based on your pictures, I think you might have something like our Series 380 channel balance, but I honestly don't know. I would check other identical windows in your house to see if they still have your balance hardware to use as reference.
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