Sadly this is the current shape of my 2nd gen CTS, It seems to my untrained eye to be mainly the fender and the shattered headlight, everything else seems fine. The headlight is still getting power and functioning as well. Is it realistic to DIY the fender? I figured the headlight I could. Any suggestions for websites with parts or how to match the paint? Or am I better of finding a cheap body shop somewhere? Has anyone had a similar repair and have advice on it?
Buy a new fender. Get a genuine GM fender and get it painted at a good body shop that does colour match and a good clear coat. It's an EASY bolt-on job (not without its frustrations but super easy). While you're at it, get a new headlamp assembly. The damage to the bumper is superficial and easily repaired. My $0.02.