There is an easy way to get the WC books back. Write one. Baen, the publisher for the original books, takes unsolicited manuscripts. However the manuscript has to be the full book and you have to be willing to wait about a year before the book will be reviewed and considered, but that's the nature of the beast. As far as I know, and I have checked on this, Baen still holds the publishing rights to any Wing Commander book based within games's universe. So what that means is you won't be able to use any references to the Pilgrims, or any of the tech established in the movie, but you can still use fighter designations.
So if you plan to write a book try and get an agent, because an agent can speed the process along quite a bit.
I'm currently working on a book of my own, not WC, but my next project may very well be a Wing Commander book, potentially an attempt at Prophecy or a Privateer spin off.