You could be SOL right now. Only the SX, X-Lines and X-Pros come w/rails. Thule & Yakima make racks for some rail-less cars like a VW GTI, but unavailable for the new Sportage (yet). Amazon cheapies are going to sit on (and scratch) your painted roof. And if you have the pano sunroof, you gotta make sure that the sunroof is going to clear the rack when opened. Not a given, at all.
Best bet is to install a hitch and use hitch-based carriers or trailers. This is one of the (many) reasons I sprang for an SX.