What spring companies can you by a custom rate from?

[eclipse98GST]

Im leaning towards doing the KYB AGX + Eibach Sportline combo, does anyone know the Eibachs spring rates. Also, what companies make springs with custom spring rates, im trying to do a 400/500 LB combo.

 

[SlowSpyder]

Why dont you call eibach. Im pretty sure that they can make you some springs with custom spring rates.

 

[RamenPride]

Also, what companies make springs with custom spring rates, im trying to do a 400/500 LB combo.

might be cheaper to just get Ground Controls and order the spring rates you want, rather than having them wind new springs that fit like OEM