Exterior stops

A contractor from Maryland says:
These plastic pieces are on the exterior of a bow window and hold the IGU in place. They are brittle and crack when we try to remove them. The thickness of the glass is 11/16.
User submitted photos of window hardware.
Profile picture of Tom
Tom from SWISCO responded:
It's hard to tell what you have based on these pictures. Is there any way you can get us a shot from an angle that clearly shows its end? We will need it to be as undamaged as possible, as well. I know yours is very brittle but please try your best. It would be a huge help. In the meantime, check out our selection of window glazing and see if you can find a match here.
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