Benz? http://www.benzspring.com/ I've never really heard anyone that has had much luck with a re-arched spring. Once the steel bends past the yield point, it's not going to hold it's shape for as long.
Went to Benz Spring in Portland. They got them taken care of:awesomework:, now for a traction bar set up. Their good to deal with.
Thank's for the replies.