Yakima used to make a rack for them (I have the setup), but they discontinued the special clips for them a few years back. After a few weeks of searching every website i could think of, i found a set of clips, and the other parts were pretty easy to buy. It's kinda pricey though. Neighborhood of $300.
I had an OE rack which i sold, and it looked really good. They're for sale used every now and then, but not that often.
I've used the flexible universal flares before, and they worked just fine.