This type of thread is posted every now and then and while it's intention is great, in practice, the idea is frowned upon. All of us can search the boards for posts about particular creditors and find contact info, GW successes, etc. It's fine to have one-off success stories here and there and various contact info scattered across many posts. However, creating a single "database" that broadcasts creditors' willingness to provide GW adjustments may actually be counter-productive and discourage creditors from granting this nicety. Remember, anyone can read these message boards.
For the creditors you list above, I would search the boards for those creditors' names and then directly contact anyone that has had experience with them. Good luck! 
