I just returned from a ride in Mexico on my new 2008 WR450F. It did not take long to discover that the stock skid plate does not adequately protect the left-hand crankcase cover (it has the oil filler plug in it). I have an expensive crack as proof. Who makes the best skid plate to protect the engine from further expensive hits? Suggestions from personal experience would be helpful, as pictures of skid plates in parts books often do not show how they will fit on the motorcycle. The crank case part number is unique to the 2008 WR450F, so something makes it different from the 2007 WR450F crank case cover. Great ride until I hit the rock.