bgr...
This same thing happened to me. You won't be able to get rivets in there unless you have a big a$$ rivet gun and it can work in really small places.
What worked for me and I think is alot easier and better.
First thing is calll Maxx and buy a new door handle.
Using the procedure that is running around here to change out the window regulator, I was able to get access to the door handle rivets.
This is where things get pretty simple.
Take a drill and drill out the rivets. Actually all you need to do is drill off the rivet head and pop out the rest of the rivet.
Go to your local hardware store (lowe's in my case) and take the door handle with you so you can size up the bolts to fit into the handle holes.
I'm sorry that I don't remember what length I bought them, but I think they were an inch. Along with that, I bought some washers, bolts, and high strength lock-tite.