I'm afraid your glazing bead is not familiar. Do you know the manufacturer of the window? That might help us identify the part you need.
We are familiar with Patriot windows, but the glazing bead you show in your photos does not look like one used by them. It almost looks like it's from a wood sash window. Unfortunately, at this time we have not been able to find anything that can match. If we can see a picture of how the glazing relates to the sash we may have an idea, but at this point I'm not sure if this is something we can replace.