OP, I broke a spring while enroute to Vermont fall of 2021. Replaced that one spring on the road, replaced the other 3 when I got home. Fairly easy to do at home with a jack, some jack stands and hand tools. While I was at it I replaced the shackles with a wetbolt kit. I also upgraded from a 4 leaf to a 5 leaf and gained a couple hundred pounds per spring capacity.
Springs weren't very expensive, neither were the wet bolts. Unless your axle is damaged, I wouldn't waste the time or effort replacing those. Springs and shackles are wear items, axle isn't.