For a Wills Point install, the truck carries door panels in both insulated and non-insulated builds, since the mild-with-occasional-freeze climate here means either works - it comes down to what the homeowner wants to spend and whether the garage backs onto living space. We stock standard torsion springs sized for both single and double door openings, which covers most of what shows up on houses from the 1975-to-2013 stock that makes up this area.
One limitation worth stating plainly: specialty sizes, custom wood doors, or anything outside the standard catalog isn't something we carry on the truck day-of. Those get ordered, and lead time depends on the manufacturer, not on us. For a typical replacement - standard steel or insulated steel panel, matching track hardware, a new opener if the old one's tired - we're usually equipped to do the whole job in one visit once we've confirmed the opening size and what's currently installed. We also carry basic reinforcement brackets, since older headers sometimes need a little extra support once the new hardware goes up.