Mullion clip for a 25 yr old octagon wood windoe

A home owner from st. louis, mo says:
January 16, 2024
This window mullion originally had clips that had a pin to put into belved edge of wood window but had an "extention" that would fit into the slot on 4 of the ends. I do not know the MFg of window or have any of the original clips to show you.

In the screenshot 2024 pic above it shows a clip I have tried but I need the clip to be at least 1 inch in depth so it can reach the slit in mullion with a 5/8 internal width.

Do you have a mullion clip that would fit my original window design or a plastic clip similar to screenshot picture that is at 5/8 wide interally with at least 1" in depth?

Thanks!
Thumbnail of the uploaded file named mullion cross section
Thumbnail of the uploaded file named mullion view
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Emily from SWISCO responded:
January 17, 2024

Thank you for reaching out to us. Unfortunately, we don't sell a match for the clip you're searching for. The 55-182 and 55-200 are our only options, I'm afraid. I truly apologize that we can't offer a suitable replacement. 
Grid Clip
Grid Clip
55-182
$0.91
Window Grid Retainer
Window Grid Retainer
55-200
$1.30
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