A piece of plastic fell into the mechanism and now the passenger seat belt is unusable. Nothing I found online is specific enough. I tried to pry it open with a very thin piece of flat metal and screw drivers but I'm damaging the plastic and it doesn't budge. How does one take the seat belt buckle apart? Does the narrow part slide down? do the 2 halves have to be pushed apart?

I understand that this was a recall item years ago and the local dealer says they'll replace them, but they don't have the matching color for my interior, only the grey. Maybe I should just take it there, but it would be highly inconvenient, especially if I have to leave it there, which is likely.