Did you buy the car from a BMW dealership? If so, they should be able to supply you with one.
They also sell an aftermarket tow hook plate holder so you dont have to drill holes in the front bumper.
1997 328i- retired
2007 328i- retired- lease
2006 330xi- retired
2013 M3-Laguna Seca-6 speed-EDC
2006 X5- retired
2011 X5- retired- buy back