This model of the Battlestar Galactica (from the new series) was developed as part of the Battlestar Galactica Fleet Pack. A long history of the development, and links to many other fleet models can be found in the original forum thread, and in the download section at zealot.com.
Over the next few weeks or months I will get the rest of the fleet posted here as well, and build a dedicated download page for them.
The Downloads page is now live and the Battlestar Galactica Fleet Pack even has it’s own page. Go check it out.