Plastic sash available?

A home owner from Portage, IN says:
March 15, 2016
In your installation video for seris 751 channel balance you show the plastic sash being removed. This the the cream colored dual channel sides that ghe channel balance slides into from top end.
My question is...do you sell the plastic sash/sill part also?
Because, to remove mine is difficult with stprm windows on exterior side and 2 layers of trim on interior side. I can try to pinch it and pull from the middle to remove but afraid it will crack.

Please let me know.
Thanks,
Bob
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Paul from SWISCO responded:
March 16, 2016
The sash is the part of the window that contains the glass. Are you referring to the jamb liner, instead? If so, I'm afraid we do not sell these. You should contact a local mill work, they may be able to help.
Balance knife lock Shoe
Balance knife lock Shoe
15-014
$1.09
20" Series 751 Channel Balance
20" Series 751 Channel Balance
S751-20
$10.45
How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
VIDEO
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Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
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