NAMI patio door locking knob

Hello, thank you for posting,

I am hesitant we can offer a suitable replacement option, but to further review are you able to provide additional pictures of the full handle set and internal lock? From there we can get a clearer idea of the overall style of the hardware to determine if we can assist. Thank you!  

Thank you for the additional pictures,

Unfortunately after review, we are not able to provide a replacement for this style of knob or handle set. You may need to contact the original manufacturer of the door to determine if this style is still available. I apologize that we cannot assist with your repair.