Now I'm going to give away my age......I grew up in Los Angeles, the San Fernando Valley, to be exact. I've messed with cars ever since Jr. high School. Lots of old Ford restorations. There used to be a business called "Hollywood Spring and Axle", in Hollywood. It was a real old timey kind of place, with faded, dusty black and white photos all over the office of cars they'd done . Not that any of this will do us any good now, they're long gone, but you could just unbolt your springs from your car and bring them in to them, and tell them what you want......softer ride, harsher ride, more ride height, whatever. They would take your rusty crappy old parts and tell you to come back next week. When you did come back, your coils or leaf springs were re-arced, re-heat treated , ground smooth, and painted, and always cheaper than sourcing new. I feel privileged to have known them and had visited them many times back when, mostly because I worked at a shop that restored and did maintenance on early Fords. years later I visited them again when having Triumph and MG springs re-done for a man I worked for, on his car collection. Those were the days when real craftsmen still toiled at their trade, they didn't get rich, but I gave them all the business I could. As I read various peoples ride height issues here, I wish I could just give you their phone number. They always came through with the answer. And yes, you might guess from their name, they also "dropped" axles for the hot rod crowd. It was like a blacksmith shop.