They can easily be changed out. A locksmith can also help. However, something to think about:
What is the total value of the stuff that you are locking up? The compartment doors are very thin and weak and can easily be pryed open using a simple screwdriver or similar instrument and the cost to replace or repair and paint the damage caused by forcing them open can exceed the value of the contents. I have replaced some of the 751 keyed locks with a simple non locking rotational latch which eliminates messing with keys.