1969 Covertible top rivet

A few weeks ago, my wife was putting down the manual top on my 1969 Chevelle convertible. Apparently, she got the top a little twisted and on the passenger side, popped the rivet that holds the support bracket from the middle bow to the main frame rail. This rivet is about 1" long and has a brass bushing inside. I don't think I can replace the rivet even if I found one, since I would need a press to refasten. Does anyone know where I can get a bolt/nut arrangement as a substitute?