A follower on my tumblr (4mbivalent) sent me the link to this plaid shirt.  It does look like the one Clary Fray (Lily Collins) is wearing during the filming of The Mortal Instruments: City of Bones, but  it does have sleeves and no frayed bottom.  It is possible the costume departments cut the sleeves off and frayed the bottom.  I will put up the official one if this one isn’t it, in future.

You can buy it HERE for $29