Andersen mullion clips

A contractor from Massachusetts says:
For my house built in 1984-85 with Andersen windows with snap in 6 over 6 mullions. Plastic clips 12 per window. Like most the clips dried out in the sun and break during cleaning. 5/8" inner width 3/8" height.
User submitted a photo of a window clip.
Profile picture of Dave
Dave from SWISCO responded:
Thanks for posting in our Discussion Board. I don't recall Andersen ever using a plastic clip. Are you sure that Andersen is your window brand?

That said, take a look at our 55-184. Do you think you can use this clip? You may be able to modify it to fit. Let me know what you think.
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55-184 : Clear Grille Clip
55-184
Price: $0.95
Clear Grille Clip