501st

Hi all, I have a don post stormtrooper mask from 1996 lucasfilm. I am tryin to repair this bucket for my little nephew to play with. As you all can see from the pic, one of the eye lens has broke off and need replacement. any suggestion on what i can do to the lens? and i would like to repaint the helmet,tube strap, teeth as well. any help will be good. thank you all for your time.