I used to work in a spring shop. If you go online and search 78-705, you'll find lots of different suppliers for the stock replacement springs. 78-705 is the Spring Research Institute 'part number' for that particular leaf spring. The "SRI" is kinda the governing body over all leaf spring manufacturers. Each spring for every car/truck/heavy truck has an SRI number. 78-705 should fix you right up. You'll find a bunch of folks that sell them. Check and see if they're a member of the SRI and you'll get a quality piece... probably a LOT less expensive than your popular retailers are selling them for. Most likely, the retailers are buying them from Dayton, Triangle Spring, or one of many other. Good luck hunting !