Patio slider door handle
Thanks for writing in. This handle set looks like the 82-060 International Handle Set. This has 3" hole spacing, center-to-center, and a clamp lock design. Take a look and let me know if this is indeed what you have.
Now unfortunately, this handle set has no compatible outside key lock available. I apologize for the inconvenience. If you need this, our best recommendation would be to use the 82-009A Handle Set and the 82-306 Outside key Pull. These two items are compatible, and the 82-009A has a similar clamp lock design that your old setup has. The issue is that the 82-009A also has different hole spacing, at 4-15/16", so you would have to drill new holes to install it. Take a look and see what you think.