window grille clip - white plastic

A contractor from Conway says:
need 50 replacement clips. I do not know original manufacturer. Windows are 38 years old.
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Tom from SWISCO responded:
Unfortunately, I'm not going to be able to suggest any clips for you without seeing what you have. Can you take a photo of this clip and send it in so we know what you are trying to replace?
A contractor from Conway, SC says:
Manufacturer was M&W, about 1979. Thanks for your assistance with this, Mike.
Grid clip
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Paul from SWISCO responded:
Please compare our #55-184 grill clip to yours. Is this your clip?
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