i ran over a pheasant the other day at high speed and when i stopped i noticed that my fog light grill had come come loose then i noticed the fog light was loose so i took the grill off and all 3 fixings have broke off the fog light i wanted to know if u can replace just the casing or do i have to replace the whole unit also the bulb looks as though its xenon not a halogen bulb is this standard on gtis ill try get some pics to show the problem but ive not taken any just now