Help selecting screen spliine

A home owner from Charleston SC says:
February 17, 2021
The photos indicate what I removed. It is old and brittle. The groove in the metal is .708MM at the front and then much wider inside [do not know what the width is unfortuantely]. I tired using some 1/4 inch foam backer rod from my paint store, and while it fit nicely, it was not stiff enough to hold the screen taunt. Any help would be greatly appreciated.
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Casey from SWISCO responded:
February 18, 2021

Hello,

You're welcome to look through our selection of screen spline here but, unfortunately, we do not carry anything in the configuration and size shown in your photos. We wish you the best of luck with your repair and thanks for posting! 
Patio Screen Door Spline, 25'
Patio Screen Door Spline, 25'
59-236
$9.70
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