I ordered the Mopar ones on eBay. Exact same as factory but I have since lost the package. I need to find them.
And they won't void your warranty either!!
I ordered these, no problems with them breaking yet. They also sell the grey "OEM" style with the foam washer too.
http://www.clipsandfasteners.com/Jeep_Fender_Flare_Rocker_Moulding_Clip_p/a21528.htm
And they won't void your warranty either!!