it was based on this ship:
http://www.bcfiles.com/file.info?ID=15288 (see screens) except it had the ambassador engeneering hull attached yet. I think it may have been attached without the neck, then a short pylon with a nacelled under that. I can't remember if it had any akra torpedo pods, but it did have 4 new orleans type torpedo tubes attached to it. Does anyone remember this one? It was called an ambassador diplomatic cruiser variant or something.
edit: nevermind, I found the ship. Someone didn't post it directly, but rather as a link:
http://www.ussmiranda.com/frames.htmasimov class in their ship database, incase someone else was wondering as well.