I have not personally had them installed, but I understand that toys for trucks will do it. They have shops in Green Bay, Greenville, Menaha, Oshkosh and Schofield.
Really old thread to resurrect, but I just got my Jeep here in NE Wisconsin and am wondering if the OP or anyone else has found a good-quality shop to do installs.
I will likely need some minor stuff installed like springs, shocks, and control arms, etc. for a mild suspension mod.
I have not used them before as I have done my own wrenching so far, but have seen a few ads on my facebook feed for them. https://www.extremecustoms.com/