What about this one? http://www.monoprice.com/products/p...d=1083111&p_id=9998&seq=1&format=1#largeimage for $7.07 shipped for the iPhone 5?
They have one for $6.05 for the iPhone 4: http://www.monoprice.com/products/p...d=1083111&p_id=8846&seq=1&format=1#largeimage
Looks darn close to the Otterbox Commuter, I wonder about the warranty though, Otterbox has been great for me on that front.