EDU units are all fan made (except for the units that are already used in warlords scenario).
By the way, only a small part of the units are in the game. Every ancient and medieval unit have his flavor unit (that are supose to be in the asset of the game). All of ours unit had to be reviewed by the lead artist and those units that aren't part of the game are those that the lead artist didn't have the time to review.
If you are wondering, the eagle pikeman is made by Rabbit and the Native swordsman (the crocro head) is made by Sez (model body), me (head model) and Elhoim (skin), the concept is by Alexander (I do not know if he have an account here, I think he's from Apo)