There are definitely differences from the Calmini kit.

For one, this configuration is designed for Hi-Steer. I believe it also gives additional lift (about 6") which is essential for those people who want to clear 35's without a BL. I still have a few places to trim because there is rubbing at full flex in places.

As for a kit, that's up to the guys at Harsh Terrain. I know they have the capability, but I won't speak on their behalf.