replacement sash support window balance

A quick learner from hendersonville nc says:
part shows date 6-85 #11600-3 windcws measure 36 in. w x19 1/2 in. h they are 8 panel each about 10 lbs. each cannot find same #item on your site
A quick learner from hendersonville nc says:
I need 1 Left Side and 2 Right Sides for my bedroom windows. The measurements of the windows are 36"Wide 191/2 High 8 panel 10 lbs each.
User submitted a photo of a window balance.
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Tom from SWISCO responded:
Thank you for your patience in this matter. It has been a very busy season. I cannot make out any stamps on your operator, but based on your window size I believe you may have our 24-1033. One way to confirm is to carefully go over your balance box and see if you can find any stamps that read "1027," "1031," or "1033."
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