Weathershield wood casement window weatherstripping

A home owner from Brookline, Massachusetts says:
I have 1983 Weathershield wood casement windows, for which I need to replace the weatherstripping. The head and side weatherstripping is hard to find as it has a dual kerf with a half bubble on top. Please see attached pictures where the half bubble is missing.
User submitted photos of weatherstripping.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I'm not sure if we have this exact seal. See our 58-053 or maybe our 58-055. These may work instead, but I'm not sure. The 58-055 may be your best bet, since it appears to have a similar angle.
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