If you still have those hooks, you could try super gluing them back on, although I'm pretty sure that wouldn't last too long. The best way to get an exact part number would be to visit your local dealer. Come prepared with your VIN just in case that makes it easier for the parts guy. Although sometimes they can be pretty stupid about things... it usually works out.
By the way, the same thing happened to my driver's side thingy. I actually never knew why it was loose... but now since you've posted this it makes sense.

I think mine broke 'cause I got mad one time and slammed my fist on it.
I'm replacing most of my car's interior with that of a junkyard car, so my problem will be solved.
You COULD also check local salvage yards too if you have lots of time on your hands.