We carry a working range of torsion springs, extension springs, cables, rollers, and hinges sized for both older single-piece and sectional doors, because a Kaufman call can go either way depending on when that particular door was swapped. Standard steel panel sections in common widths ride along too, along with the openers we install most - chain and belt drive units that fit the headroom you typically find in a 1970s-built garage, which is usually a few inches tighter than what gets built today.
What we don't carry is custom millwork or discontinued panel profiles. If your door is an older style that's been out of production for years, we can usually source a compatible replacement, but matching the exact original panel pattern sometimes isn't possible - that's the one limitation worth saying up front rather than finding out on-site.