I tried to find over sized rivets but could not when restoring my Challenger. Instead, since I have a lathe, I turned some bronze bushings after drilling the holes larger and used my old rivets. I ground the small ends off the rivets to remove them then when reassembling I welded them in place. Hinges work good as new!.
You might want to make sure your gear teeth are good if you have the early hinges. They can be built up with weld and ground to fit.