Vinyl glazing beads

These white glazing beads came with the vinyl/aluminium (?) windows that are about 20 years old. I cannot find any other numbers or markings on either the window or the beads themselves...

These beads sit on the exterior of the windows and with our harsh New Mexican sun and wind- they deteriorated easily... bent out of the groove or cracked in most of our east/south facing windows.

When I took the picture, I did try to gently hold the vinyl so the profile of the piece is not distorted... Thank you.