We stock the rollers, track sections, and hinge sets that fit doors from the 1970-2003 building window that covers most of this service area, including the early-90s stock common in Fairbanks Ranch. Nylon rollers with sealed bearings are the standard swap now - they run quieter and don't wear the track the way the original steel rollers did.
What we don't carry on the truck is custom or oversized track hardware for doors outside that standard run. If a house here has a wider-than-standard opening or a custom panel setup, that part gets ordered, and the honest answer is that it can add a few days to the job. We'd rather tell you that up front than promise a same-visit fix we can't back up.