My last oil change shop didn't replace the plastic service cover that conceals the oil pan and filter properly. This cover is supposed to be held into place by two bolts and a push-in fastener (don't know what this is called). The shop only used one bolt, so I'm in need of another bolt and the push in fastener. I am also in need of the "nut" that the bolt screws into (this "nut" is like a clip with a threaded hole). Does anyone know the part numbers for these items? Any help appreciated.