replacement lock parts
Then labels of the door will not help us identify what you have nor will it help us locate a replacement. The best way to go about finding what you need will be to have you send us photos of the part in question, along with some detailed measurements. From there, we can get started on searching for replacement options.
As long as the latch and lock are working on your old handle set, then you only need to replace your mortise lock. You can tell if the mortise itself is what needs to be replaced by removing your old handle set and attempting to manually 'flip' the mortise with a slotted screwdriver. It it fails to flip, then it's the mortise itself that needs to be replaced.