Well, if you're looking for a kit, I think you should keep looking as I'm quite sure from the description that this is a scratch built model, lovingly researched and handcrafted in an edition of one by Jerry Terrell. I doubt very much he made any molds to reproduce any of it.
Also, the pictures are dated 2001, which means this is 11 years later and who knows what the status of the model or the guy are now.
Beautiful work though.
Somewhere out there is a set of fully detailed and measured technical drawings of the Shuttle exterior set piece which were probably used to fabricate this model. If you are looking to do the same, I suggest you search the web for those.