The good news is your ok and it's just a bumper. You already have the pics for insurance. You could wait for them or order the bumper from courtesy nissan who's really good with the parts, and get it painted and put it on yourself. The car is so new and im sure you garage it, color matching wont be an issue.
850 Rear Bumper :: Body(Side & Rear) :: Genuine Nissan Parts :: 370Z Parts (Z34) 2009+ :: CourtesyParts.com
Good luck, I'm very sorry.