My favorite game... try a post in the parts wanted thread looking for backglass. Ron Webb (http://pinballglass.homestead.com/) has reproduced these but he's currently out. Great game, great price. If you need a score card let me know, can copy mine.
Pinball Resource can fix you up with most pf parts (except the posts)
Pinball Rescue has the plastic but yous just need flatening.