Jeld Wen SLiding door handle lever replacement

Take a look at our 82-107. See if this matches what you need. Be advised though that a broken thumb lever is often a sign that the mortise lock itself might be broken. To see if it is, remove your existing handle set and try manually 'flipping' the mortise with a flathead screwdriver. If the lock doesn't throw, you need to replace the lock as well.