John - I was just reading Coos' interesting account of how he manufactured a reproduction Miami Beach playfield. He mentioned that Chris Dade from the U.K. has a (or perhaps several?) "sticker" for the playfield. The article mentions a pdf file, which sounds like a digitized playfield image. It might be worthwhile to reach out to Chris or Coos to see if they have any ideas about restoring your playfield. Here's the article about the repro playfield:

http://www.coos.net/bingo_e/playfield.html