While a HD steering stabilizer might help mask the symptom of DW, it won't cure it. DW is usually triggered
by an out of balance tire(s) and something else being too loose, often the trackbar, allows it to fully develop into DW.
First, the taller the Jeep, the more absolutely critical that perfect tire balance be achieved. So get your tires balanced and tell the tire jockey that he can't be anything less than perfect... which isn't hard to do with modern tire balancing machines.
Then, check your trackbar's lower mounting bolt and make sure it is TIGHT. It should be torqued to 55 ft-lbs., even if the trackbar feels tight when wiggled by hand. A too loose trackbar can commonly allow DW to fully develop as it often works loose.... or if the trackbar mounting bushing is worn or loose.
Finally, set your toe-in to 1/8" per the instructions at http://www.4x4xplor.com/alignment.html
which can easily be done quite accurately at home.
This should take care of your DW... at least most likely.