"... except sending out to Canon ..."
I might have to add some more bad news. First check to see if Canon still works on the 1D Mk III, I don't think they do at least CPS doesn't. If they don't Midwest Camera Repair (google it) does.
EB
EOS 1D, EOS 1D MK IIn, EOS 1D MK III, EOS 1Ds MK III, EOS 1D MK IV and EOS 1DX and many lenses.
