Broken Atrium window balance

A quick learner from McCormick SC says:
I have an Atrium vinyl tilt out Double hung window. The right side channel balance is pretty much destroyed. Cast metal parts, spring and support pins in the channel are damaged. Stamped number on the side of the channel is "33D" and the channel is 34 inches long.
Can you fix me up with a matching part? If so please send numbers along with web address.

Thank you in advance
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Tom from SWISCO responded:
We would be happy to help you find the proper balance. Is there any way you can show me a picture of the type you need? You can show us the left side, since the right side is destroyed. That will allow us to find the best possible match.
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