Just for fun, I decided to try to make a 3D model from a design for a paper model. It took about a week from start to finish in my "copious" spare time. I based it on a design for a paper model of one of the Goldstone tracking telescopes, which is available at http://deepspace.jpl.nasa.gov/dsn/educ/model.html
The paper model was rated as "moderate" difficulty. So far as 3D models go, it was relatively easy, although using the hand-drawn diagrams was somewhat frustrating.
The result is available as an Addon for Celestia at
http://www.lepp.cornell.edu/~seb/celest ... dss-24.zip
(546KB, expands to about 1MB)
Unlike a real paper model, this one tracks the specified target.