Handle and Locking Lever
Measurements:
Center of top hole to center of bottom hole is 2 3/4 inches
Center of top hole to center of 2nd hole from top is 1 1/2 inches
Center of 2nd hole to center of 3rd hole is 1 1/2 inches.
Depth of the hole in the side of the slider to insert the locking mechanism is 1 1/2 inches
I called and spoke to you guys on the phone. For some reason, they don't know what handle they used for that series/model. To me that's extremely weird. If there are multiple handles used for a series, use a letter next to the model number to indicate the handle type. That would avoid a lot of hassle for customers and streamline faster response on getting parts out to customers. It's a win/win.
Hopefully I don't need to replace the slider with a different one.
Hey there! I'm sorry to hear you're having trouble with this handle. The reason we can't identify what you have based on the Series and model of the door is because we didn't make this door. We don't make any doors, in fact; please understand that we're a third party supplier that sells many different parts made by many different companies. We have no control over how parts are designated from company to company and therefore cannot implement the changes you've suggested.
Furthermore, your handle is actually a generic style, so I don't think having manufacturer information would benefit us anyway. When it comes to stuff like this, seeing a photo just makes things a lot easier since we can eyeball it right away.
In your case I think the 82-030 is the best option. This has a 3-15/16" hole spacing, which should match your door, and comes with an adjustable thumb lever.
It also looks like your mortise lock is missing. Without seeing the original, I can't be 100% sure of what you need but my best guess is the 82-226. Review its dimensions and see how well they compare to the space available in your door.