These are the license plates used on Rachel's (Rhona Mitra) blue pick-up truck in the movie. Matching set of front and back plates, these are made of plastic with molded letters, and can be seen in several scenes when Rachel and Nana are driving the truck around town. They are marked on the back 'Rachel P.U.'

Front license plate:

Rear license plate:

This is how the back of the plates are marked:

Here's some screen shots showing the truck and Rhona Mitra driving it: