Replacement Pella Window gasket

A quick learner from Cambridge, WI says:
July 11, 2016
I am looking for a replacement gasket for the bottom of our pella window. It is 26" long, 5/16" wide and where it fits into the bottom of the window is 1/16" wide. It appears to be plastic and is flat not tube type gasket
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Tom from SWISCO responded:
July 13, 2016
Could you remove a sample and show us a picture of this gasket's end? That will help us find the best match. Please also give us your measurements of the end.
A quick learner says:
July 29, 2016
attaching photo of gasket end. The gasket is 5/8"wide and the small part that fits into the groove of the bottom of the window is 1/16" wide
User submitted a photo of window spline.
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Tom from SWISCO responded:
August 3, 2016
Thank you. I'm afraid we haven't been able to find this exact gasket. Our 58-178 Pella rainstrip appears similar, though. I wonder if this could be a newer version of what you have. I'm afraid I cannot be certain, but this may be the closest match we have. Look it over and let me know what you think.
Pella Casement Window Rainstrip
Pella Casement Window Rainstrip
58-178
$6.37
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