This happened to mine a while back, just unlock it and then put a small screwdriver into the hole where the handle used to be (you might need to break it off more) and you can pull back on the tab to open it up. Then get the replacement off eBay as said in the thread and replace it.
Just be real careful as you transfer the locking mechanism as the locks pins are loose and they will fall out - you will probably lose the tiny springs if that happens.
