1965 Anderson patio door roller

Hello, my uncle has a house with 1965 circa Anderson wood windows and sliding patio doors; one of the doors needs a replacement roller. I did see the choices on the website but if I could speak to someone and narrow the choices down by year that'd be great. I do have a picture of the door handle and bottom rail & track of door if that's helpful. The door is heavy and very difficult to remove (think header above has sagged over time) so not too easy to obtain a picture of the actual roller.
Thank you-Jim