Correct replacement channel balance?

A handy person from Tinley Park, IL says:
I have a client who has Republic replacement windows purchased in 2006. It appears that a channel balance has broken. I have attached pix but can't determine which series is appropriate. It is 24" long. Can you help?

User submitted photos of a window balance.
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Paul from SWISCO responded:
Good morning, and thanks for posting on our Discussion Board! This hardware appears to match our S770-24 channel balance. Does that look about right? Also, what stamp is printed on your channel?
A quick learner says:

There is a stamp on the back of the channel balance that shows "24G". Does that have significance?
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Tom from SWISCO responded:
Thanks for getting back to us. Yes, the 24G stamp does indicate a certain weight range, but unfortunately it is not standard. To make a Series 770 balance with that stamp would require it to be custom made. Could you double check, just in case? Please remove your sash from the frame and weigh it on a scale. Then, let me know what you come up with. This will help determine whether the 24G stamp is, indeed, what you need.
A quick learner says:

An update. I pulled the sash and with a bathroom scale, the sash weighs approx. 27.5 pounds. Hopefully, this is within the range available.

Also, attached is a picture. Are the clips that the sash lock into available as well? I'd like to replace as many components as possible for the highest likelihood of trouble free operation going forward. Many Thanks
User submitted a photo of a window sash.
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Tom from SWISCO responded:
Thank you. We do not seem to have a standard option that can support that sash weight. Your balance will have to be custom made. Take a look at this Custom Channel Balance Order Form that I have started for you and fill out the Contact and Shipping information. One of our representatives will be in touch with you shortly thereafter.

As for the clip in your picture, are you referring to the Pivot Shoe, or the metal tab that fits into the pivot shoe? If it's the pivot shoe, look at our 15-178, or even our 15-129 and compare them to your own hardware to see what matches. If it's the small metal clip, see our 15-043.
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