Co-author a book that is in process - repost

I am working on a new business book that illustrates four character types in the Wizard of Oz as a way to improve team performance. I am calling the book "Team Wizardry". The 75th anniversary of the Wizard of Oz is next year and I am trying to publish the book in the next four months to take advantage of all the publicity surrounding this anniversary. I have co-authored three prior books relating the same character types to Star Trek (Boldly Live As You Have Never Lived Before, The Trek Factor, and Boldly Live!). I’m the idea person and I need a writer to help me write my latest book—Team Wizardry. Another writer and I completed the book proposal and sent it to my literary agent. The literary agent is anxious to market the proposal to publishers, but my initial writing associate is unable to help write the book. I'm not a great writer, but I am very creative when it comes to ideas for these books. This personality type model was my creation. I’m looking for a writer that has successfully published at least one book to help me write Team Wizardry. My literary agent suggested a few changes to our initial book proposal, but overall it's a great proposal. I just need a writer that has published at least one book and has some business background to help me write this book. Please let me know if you have any ideas about how I could find a writer to help me. Thanks. Rich Raben