Have you got the parts microfiche downloaded form this site so you can identify the part you need?
I can't see the pic but if I remember rightly Its like a flat piece of metal with 2 nuts welded on it, fits with the rubber boot cover that is around the air box, it will be there somewhere.
Also for next time you only have to undo the long allen key bolt on that bracket to get the tank off and not take the whole bracket off.