There are three different versions of Mantled College Robes, all of which are unobtainable without the use of console commands.
Acquisition[]
Mantled College Robes can be obtained using the console command, for example, player.additem 000D3DE9 X, whereas X is the desired quantity. Change the ID in the command to obtain the other versions.
Gallery[]
Version 3 - ID: 0010D6A4