I also found another source for leaf springs but have not purchased from him. They list springs for a number of AMCs, including Eagles and they call out SX4/Kammback's separately. The prices seem reasonable. Here is the link
www.thesuspensionking.com
I was looking for some leaf springs for my Gremlin, and asked about the quality of his springs. This was his response:
I manufacture in Pittsburgh with USA steel Hi grade 5160H. I temper them to a hardness of a 51 Rockwell. I've been doing this since 1973. I use original equipment blueprints. If you need ubolts, please go to our ubolt section, you will need to take a few measurements. They are extra.
Thanks again,
Jason
Yeah, I saw that place too, they look like a nice place to do business. They are also really close to my area too. I really like that they, and the other two places that I found have American made steel. Because I insist that any steel I buy be made in USA (Cars included) because many of my family members have made their livings in the Steel Mill.
As of now, I think I'm going to get my leafs from Stengel Brothers because they have the highest load rated springs (535 lb), and have free shipping. I will probably still get my Coils from ESPO along with the leaf spring bushings, shackles and u-bolts. That's still a month or two away before I order, so things may change, but I'm thinking that's the plan for now.
Also, I thought my springs were starting to rise back up with the warmer weather, but after I filled it with gas today, they sagged back down to the normal spot.
I kind of forgot how much weight in gas that big tank holds.