Hey Steve. That was a "prototype" building that Jim "Bridgeboss" made for me a number of years ago. I am fairly certain he did not continue to make these as "production models" as they do not show on his website.
I guess you could always ask Jim if he would make others.
If you still have RUN 255 of the magazine or the video version, my layout was the cover feature. There are more pics of the building in that article. If you want, I could also post a few more pics of the structure when I get home tonight. Just let me know.
Hope that helps.
Donald