Spline for Aluminum Storm Window

A home owner from PA says:
I'm looking for the spline for an aluminum storm window. The present spline is approximately 5/16" wide and fits the frame shown in the attachment. The existing dimension appears smaller than the spline shown on your site.
Thanks for your help
User submitted photos of window hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting. I don't believe the glazing spline you need is still available. Take a look at our 59-068 to see if you can use this one as a replacement.
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