Looking for either a smart lock, digital lock, or key lock for this American Craftsman I believe is 50 series

Thanks for you post! We do not sell smart locks or digital locks but I am confident we can recommend a replacement handle set with a key lock for your sliding glass door.

To confirm the best replacement option, I'll need to see photos of the interior handle and the internal mortise lock the handle set interactions with. Please also confirm the distance between the installation holes; from hole center to hole center.

Feel free to reach out with any questions you might have in the meantime.