looking for a spline vinyl window glazing strip

A home owner from Elgin Tex says:
9/16 x9/16 looks like old fashion type but about an 1/8 inch down on the flat side it a 1/16 inch groove that holds it in place. I can't find any brand name on window or stip.
Thumbnail of the uploaded file named IMG_0159.JPG
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Tom from SWISCO responded:

The closest match I've been able to find to your glazing is our 55-017. Could you possibly get this to work? look it over and let me know what you think.

Profile diagram of 55-017
Profile diagram of 55-017
A quick learner from Elgin Tex says:
I think that will probably work it is not exact so I don't know for absolute sure. I was wandering if it is possible to order just one piece of it until I know for sure then I could get the rest that I need.
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Tom from SWISCO responded:

You can certainly order a sample piece to test out. Browse our selection here

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