OK, there are two routes you can go with bastard packs if you want to do it cheaply. One is the S10 pack, use the bottom three leaves of the heavy duty spring, discard the main. Ride is decent and you get about 3.5 - 4"

You can use Isuzu leaves for about 6". I have a write up on here called "The perfect bastard pack, maybe. I currently run these.