I've looked all over for lift kits for my 2000 durango slt, and I can't find anything other than a 2 inch shackle/torsion bar lift, is there anything I can get that's bigger?

 

At one time, there were various kits available, but, market demand simply wasn't there, and folks stopped producing/selling them. All you can find these days is torsion bar keys, shackle lifts, and body lifts.

 

knee jerk response without reading further eh sorry .There is Tuff trucks 5.5 lift kit still made, my guys at Ground Force Performance in Abbotsford BC Canada sourced it for me. I think $3800 can eh I have a99 with a 440000+ kms on orig motor and tranny / drivetrain. running 33 x10.5-15's Motor will be 408 twin turbo. Just to spool you up eh

 

I find a bunch of folks that sell one for the 98-99 trucks, but, no one seems to carry one for a 2000. Which is what the OP has.