An axle "flip" kit (over under conversion) costs about $50 and will give you five inches.
Lippert and Dexter both sell them. If you're handy, you can just have spring seats welded to the top of the axle tube and "flip" everything. You actually just put the axle under the springs, but I love saying "flip"- it gets everyone all riled up! LOL
Me, Julie, Lil' Barry, Faith, and OSDs, Fang and Treaty
2003 Hyundai Starex (H1), 2012 Coachmen Clipper 126
I don't know when we'll be able to go camping again...