Ply-gem aluminum window.

We unfortunately do not carry a glazing bead like the one you show in your photos. Take a look at the 55-174 and 55-213, though. These kind of have the same snap in leg locations as the one in your photos. Also take a look at the 55-192 and 55-015. You would need to replace all four sides of the sash glazing to use any of these because they will not line up with your existing glazing. You can order some samples here to try out on your window.