My Compact has a rock guard, but it is missing the pins that hold it open when it is parked. It has the ones that hold it closed when driving. I am currently using wire coat hangers, very red-neck of me
My compact does not have an original rock guard but it has square tubing with channel inside that slides in and out. It has a threaded insert with a wing screw in it that you tighten down to lock rock open where you want it.