Crankarm, you need to read the rest of this thread.
My Ortleib bar bag attached to my Klickfix bracket with no drilling, making of back plates or nothing. The Klickfit bracket is a straight swap for the Ortleib bracket.
My bag is about 3 years old and so I cannot comment on bags older than that.
I bought the Klickfit bracket from my LBS. I am in Denmark.
Steve