Fresh Air Door

Really top notch work. My driver's side door is missing and, when a friend opened the passenger side door it broke off. The biggest problem is the rivet hinges. No rust and I've soaked in everything including PB Blaster. No luck. Could I drill both of them out? I know I can't replace with a nut and bolt, otherwise they won't move. What type of rivet? What holds it in place? Thanks for posting great pics. This is a big help for me.