Pella Storm Door Handle Accessory Set with Key & Lock Cylinder - Polished Gold

If the mortise lock is still functional, you can simply replace the handle. Lock Type‎Mortise Lock. Style: handle&lock. Color‎Polished Gold. 【Ergonomic Design】Features a comfortable lever handle with smooth edges, supports left/right door switching, and enables effortless one-handed operation.

eBay