metal top sash guide for channel balance

A quick learner from Windermere Fl says:
May 18, 2012
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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Casey from SWISCO responded:
June 7, 2012
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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Casey from SWISCO responded:
June 12, 2012
Please see new SWISCO product code 18-181, Plastic Sash Guide.
Channel Balance Top, New Security
Channel Balance Top, New Security
19-041
$1.30
Window Sash Guide, 9/16"
Window Sash Guide, 9/16"
18-181
$1.40
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