Unfortunately not, as the True Leithans are a radical group and thus cut off from high society. The ones most likely to know anything are either info brokers or higher-ranking members of the families of The Nine.

One way to tie in the FBR attacks may be to handwave that some info brokers are only interested in giving heir-related tips if they're provided with some records (stolen from low-level True Leithan attackers) to sell