You can always start a campaign/petition on your own and announce it on fan sites like this one. But many have tried over the years.
You can find contact information for Vivendi on their website http://www.vugames.com, they are the current owners of Sierra’s old games.
Vivendi is planning to re-release some of the old games by the way, in collection packs, but the release date keeps getting pushed back. You should be able to find various threads talking about those collection packs on these forums, and on other adventure gaming forums.