I have my bumpstops extended using 3 hockey pucks per side. I think I still need one more per side up front to stop my shocks from being the bumpstops. For the rear RE makes a kit. That's what I'm running and that's the only thing I've been able to find. I believe it extends them long enough to prevent my shocks from bottoming out.
01 TJ - 4.0L, NV3550, 2" Skyjacker budget boost, Xenon flat flares, LoD front bumper, Tuff Stuff rear bumper, RH4X4 sliders, 33" STT Pros on 15x8s