I have a broken latch, too.
It's a plastic tab that pushes on the latch to keep it closed.
Being plastic, it cracks and provides less resistance over time.
I don't think there's an easy way to replace it.
Arm rests cost way too much...
I think I'll ask a dealer about it, see if I can get away with a cheap replacement tab/lid.
Any insight from your experience with it?
Hearing that latch rattle around when I drive is absolutely infuriating. | 
