So,the idea is this,im fairly sure there are skillbooks in the game files (double click to learn),for different looking mounts.
Why not add them to the game,change their usage requirement for 3rd class,and dump them to Nostalgia for CoL?
That way people are more inclined to buy CoL,and we have some sort of customization ^^ Below is the example of one from the mounts - Lyn Draco