We don't have a fixed rate to quote here without a FACTS-sourced price, so what follows is about what shapes the cost rather than a number. A pair of torsion springs runs different money depending on the door's weight and the spring's wire size - a heavier insulated door built to today's specs costs more in springs than a lighter original door from 1957 still on the house.
Westchester's household income runs higher than the wider service area average, and we mention that only because it tends to track with more owners choosing to replace both springs and worn cables or rollers in the same visit rather than patch the minimum. That's a homeowner's call, not ours to push - if the door is otherwise sound, replacing just the springs is the honest fix and we won't upsell rollers that still have life in them.
We'll give you a real number once we've seen the door and confirmed the spring type in person.