John
I also have a 2006 Monterey that had the same problem (worn out pivot rivet). I was unwilling to pay the price for a new hinge ($130.00 at the time). So, I set about to repair my old one. The scissor hinge was screwed to the coach and pop-riveted to the door. I had to drill out the pop-rivets on the top of the door to remove the mechanism. I was unable to source a flat top countersunk rivet locally (ordering online required bulk orders), so I purchased a standard button top rivet in the correct diameter from my local Ace hardware. A few minutes work on my bench grinder provided the correct countersunk configuration. The rivet was much to long, so a hacksaw cut it down to size. After installing the rivet into the hinge (beating it into submission) and pop-riveting the mechanism back to the top of the door, it has worked flawlessly for the last five years. So, the bottom line is; you can either spend way to much for a new hinge, or with a little time and ingenuity you can have one that works as good as new. Good luck with your repair.
Richard