Exterior window seal

A handy person from Gilberet, Az says:
The seal is tan and is 5/8" x 5/8" with a groove in the outer corner. The seal was installed about 22 years ago during construction.
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Paul from SWISCO responded:

Thank you for posting. I'm afraid we don't have an exact match for this glazing. It is a very large rubber spline that isn't made anymore. We suggest our 55-029 rigid spline as a possible replacement. Look it over and see what you think.

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