i may not be able to help you out w signed editions but there's a good chance I have a few extra copies of the adversary cycle books that aren't borderlands and some signed jack novels that I have doubles of. You can email me at
garripoli228@gmail.com and I can check when I have a chance.
Also, in my quest to complete all of my collection of AC/RJ novels, the doc himself was a big help a few times.