It's a marvelous album as it is. I have never seen the movie. But from what I read here, JANE EYRE could be well deserving of THE EIGER SANCTION treatment.
More like the ET treatment, because while half the original album was unique "album arrangements" (i.e. basically concert versions) not used in the film, the other half of the album was actual film cues. This was not a similar case to Eiger Sanction or Jaws where two entirely separate recordings were made, one for film and one for album. I'm fairly certain, anyway.