I stepped out of the car in a parking lot, went to lock the door, and as I slid the key into the cylinder, the whole thing broke off its retainer and fell inside the door. Somehow I need to get that thing out of there!

With you guys' help, I did get the window crank and the inside door panel out of the way, but the cylinder is still lost on the other side of the window glass. It looks like the whole outside door handle assembly comes off, but I think it has to be unscrewed from the inside. Eventually I need to have that assembly on the workbench so I can reinstall the lock. I'm willing to take the whole damn door off and shake it upside down, but I also need to get in there somehow to reinstall it. I'd hate to cut up that vapor barrier... surely there's another way to do this.

HELP!!! Thank you!!!