metal top sash guide for channel balance

A quick learner from Windermere Fl says:
I have a top sash I need as per the picture attached. None of your stack ones seem to fit. It is made of aluminium and fits a 19-041 channel balance top. I would need about 25 pieces and a plastic version would be fine.
A user submitted image of window sash balance
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Donna from SWISCO responded:
Thank you for your patience in this matter. We are currently working on a possible replacement part. I will post again in this thread as soon as I have more information for you to look at!
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Donna from SWISCO responded:
Please see new SWISCO product code 18-181, Plastic Sash Guide.
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