PM BLHTAZ he could probably hook you up if you want new ones. You can also try http://www.chryslerpartsdirect.com/ go to the collision catalog then Fender, Exterior trim, Wheel flare, Retainer they're ~$15 each, then you'll need the nuts also (I assume). Not sure if they really have them, they list parts that aren't available sometimes.
The fronts are the same as Cherokees so you can try a junk yard.