For sale I have a F31 boot bag made by Hatchbag
http://www.hatchbag.co.uk/bmw-3-series-touring-2012on in grey c/w bumper flap & a bed mat along with the velcro to ensure a perfect fit.
Great product that protects the car from anything you or your dog(s) can throw at it.
Fit, protect & forget
£90 delivered / pick up Milton Keynes / Sandy
Cheers, Simon