Talk to a reputable tire facility to see what they do in cases like this. You could also check out what might be your best options via a search on the web. Some of the lock manufacturers may have some info. Last option would be to drill / cut them off. Need to be very carful though to protect the wheel and the bolts, or you might have to end up replacing the bolts............

Good Luck

EDIT: There are some youtube videos on this that make it seem pretty easy to get these off. One Example: http://www.youtube.com/watch?v=T8Uc2SlkSPM

Others provide more detail on tools etc. Seems like the locks only make it hard for the dum theives to prevent theft of the wheels..................