I was just reading in an article somewhere on the Ships Of The Line calendar line, but apparently the models used for the Voyager, Deep Space 9, the Defiant, the Enterprise-E and the NX-01 are the original TV CGI models, or copies of the original files that have been upgraded to work on newer software.. Apparently even the models made for TOS-R and TNG-R have made their way into the calendar's.
And we even got to see just how much detail the original CGI contained, because the seeds for the Calendar's came from the CGI artists on Voyager as they were creating the opening sequence to "Relativity". The opening shot of Voyager at Utopia Panitia was created in such detail that it was later reprinted in the first "Ship Of The Line" calendar, and the coffee table book.