Thanks!
I know about the ones at TrekMeshes, but it is this one that caught my interest...
http://www.flickr.com/photos/k42h/35...29113984226/#/
For such a seemingly simple concept, a space-going "funnel" with a fiery interior, rarely have I seen polygonal depictions that are close to the shape depicted in the original episode (before the remastered effects).
Sincerely,
Bill