Well, I had seen that first question and ended up purchasing those items only to find out that they were wrong. That second question is actually me.
I also contacted Jeep who referred me to Lambert Auto Sales. They suggested I switch out the flush rails for rails that can accommodate a racking system. Both my dealership and Chrysler Factory Plans have informed me that by doing so I will not void any of my warranty since I'd be replacing the rail with a Mopar part. Unfortunately each new rail has been priced at $135. So I could go with the Yakima Q Tower which would clamp onto the door frame, however I'm afraid of it scraping the hell out of the paint. Or I could shell out more dough and change out the rails.
Ugh, I hate these decisions.