Andersen's Tribeca internal lock thumb latch replacement fits 200 Series Narroline Gliding Doors (2002 to Present), Frenchwood Gliding Doors (1987 to Present), and Perma-Shield Gliding Doors (1982 to Present).
Keep in mind that the reason why these thumb locks normally break is because the internal mortise needs to be replaced as well, not through any fault of the thumb latch itself.