I spoke to friend who has a shop in Los Angeles area. He said he would do it for 250 installed, including balancing the tires. I think thats cheap, I checked other places and they went for 75 per corner, and didnt include the balancing of the tire. The dealer charges by the hour and they do a minimum hours on work like this, so at 70 hour for 6 hours thats 420. Let me know if anyone is in the area I can give you contact info. My contact cannot get the springs ATM, but if you get them he said he would do it.