I've found plenty. Try the general store vendors in each town (like Belethor's), as they tend to stock random clothing like robes. I think I've found some in mage/vampire dungeons. Also try the mage college, as there may be some lying around there. Good luck.
I'm just going around slaying anyone wearing robes and checking to see if they're magical. I'm not above murder. --- Deez Nuts "I believe it was Socrates who once stated: 'Blessed are the tea-baggers, for they are truly pwning.'"