Syfa-Dias...there's a bit of a drag it might be possible to slip in some reference to him actually being a Council member during TPM (only to die under mysterious circumstances by AOTC).
Maybe just sticking a quiet line of dialogue having Obi-Wan address "Master Dias" when he thinks the meeting about Anakin is over.
So instead of implicating himself Dooku's references to the archives are now hinting that something is going on in the council that he doesn't approve of.