Following is a link to a simple list of Unit ID's, their names and a link to a screenshot of the corresponding unit's information screen. The image captures were created & kindly shared by Maltrease, and Kristoffer O has said that he didn't mind me sharing this with the community.
(KO expressed his intention to make a downloadable file of all sprites in the game, but has been unable to do so due to time constraints.)
NOTE: Access is currently password protected to minimize indexing by bots & wider distribution of the images.
Link:
Dom3UnitReference v304
Login: ball
Password: pass1712
Thanks again to Gandalf for hosting!