For the sake of the forum, I'd rather not answer. I already explained in my original post that I'd prefer to not have to deal with any questions at this stage regarding where these assets originate - it's a murky, legal grey area and I wouldn't like to see the 405th become the subject of a DCMA because of some over-zealous copyright attorney.
At such a point as I become able to discuss the origins of these files a little more openly, I'll be willing to share some small information. Otherwise - again, for the sake and safety of the forum at large, I ask you to please curb your curiosity. I know it's difficult and I know you may want access to these resources yourselves, and it's difficult for me to keep them private without seeming like a hoarder, but it's for your own good right now.