"Breaking up" Lift Kit.

I'm shopping for a 3" lift kit for my '96 XJ. I recently read a tech tip in JP magazine about installing Grand Cherokee front coils to compensate for additional weight of a winch (I'll be installing a Superwinch S9000) Does anyone know of a lift manufacturer that will sell me 3" lift Grand Cherokee coils with rear leaves for an XJ?
Also...what's the difference between a lift "kit" & "system"?

For the ZJ coils and the XJ leaves, you'd have to just buy them seperately. Basically, if you get 3.5" ZJ coils, you'll probably net closer to 4.5" on your XJ.

Just get the 180lb/in XJ 3" springs from Rusty's. I think their standard spring is 150lb/in, the 180's will compensate for the weight of your winch.