I actually just replaced all of the hardware in my doors this morning. It is not too bad of a job. All of the parts are in reproduction. Since you are already going in there I would recommend getting a complete kit from somewhere like RT Specialties and replacing all of the hardware.
Not really sure what the question is. You will need to disassemble the door and remove the glass to access the sliders, everything bolts to the glass from the backside. Definitely helps to have a service manual for this one.