Check out this site.  It actually has a download for the Olympus but it does not work.  
 http://www.siliconCache.co.uk/resour...babylon5.1.htm
 
http://www.siliconCache.co.uk/resour...babylon5.1.htm
Everywhere I go, I keep running into the same problem.  Looks like Chris has pulled the model off the net.  I would contact him.  Here was another download site I found.
http://www.ultradrive.com/b5_3d_index.htm (Page)
http://www.ultradrive.com/b5_3d_inde..._hyperion_crcl (DL list)
Mesh name : Olympus-class Corvette
Mesh format : DXF Format
File size : 365Kb
Information : Raw model. No textures included. Model for personal use only, contact author for commercial use or if you wish to alter/improve this model.
Author : Chris Sapiano
Website : Click to visit