New lock and assembly?

Hello, thank you for posting,

It appears that you are in need of a new thumb turn. We carry the 82-107 latch lever kit, but unfortunately it is only available in the color white. 

For a new handle set, start by taking a look at the 82-090 that has a 3-15/16" installation spacing from center to center. Please review to see how it compares to your original. I have related a few different options on the page for color/finish difference and exterior key lock options. Please let us know if you have any additional questions!