I do have an option for you but the Ventline Northern Breeze Roof Vents have been discontinued, so most other replacement parts are hard to come by. We do not have the handle extension sleeve that goes between the knob and operator (part VB0233-02). The best option we can offer is to replace the entire vent for which I recommend the Ventline Ventadome Trailer Roof Vent part # V2092SP-28. view full answer...