Look into Full Traction Suspensions. They have 0 lift replacment springs aswell.
For the front:
http://full-traction.com/detail.php?MODELID=2&MAKEID=1&TYPEID=2&PRODUCTID=114&NOTES=
and for the rear:
http://full-traction.com/detail.php?MODELID=2&MAKEID=1&TYPEID=2&PRODUCTID=115&NOTES=