I don't know exactly how big the cervinis lower grill is, but you could try getting some zip ties or something and just putting it on the grill down there. It'd look kinda stupid, but you wouldn't have to drill anything out.
*edit* A lot of people around here are into putting their LPs at an angle on the back of their cars. They actually get bodywork done on the car to have a little indenture for the LP just to have it be crooked. It looks horribly stupid, and I'd like to kick them all.