no markings but Milestone Single Home Series 2000

A home owner from fort myers, FL says:
Two of the spines/covers (pictured) of the window have become brittle and need to be replaced. Thanks for your help!
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Tom from SWISCO responded:

Hello! We have three kinds of glazing that look similar to your pictured sample. See our 55-194 , 55-206 , and 55-191 . Carefully go over our dimensions and let me know what you think.

A home owner from fort myers, FL says:
Hi Tom,
Our window width is 50", so do you have 55-206 in that length? We need two of them.
Thanks for your help!
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Tom from SWISCO responded:

We offer the 55-206-6 which is sold in 6' increments. 

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