i have the oem chrome under the headlights for a 300c w/ headlight washers but they wont fit a base bumper since there are 2 slots on a c bumper for the chrome. (The slots can be cut if your good at that type of thing). If you want one for your base you will need an aftermarket or ebay chrome that just tapes on. Let me know if your interested.
my friend has some of those chrome pieces that he bought off ebay and they look really cheap! Theyre 3M tape parts and with time they started lifting on the corners. I wouldnt recommend the ebay ones bro.