I think sons of SR Balasubrahmanyam are still living in Madras. B Venkatraman has written a treasie on raajarajeswaram. I hope one of the chennai members will already have the address of Mudgala trust they maintain. It is in anna nagar. Otherwise I'll fetch it
We should contact them and get permission to publish some of the material from SRB / BV
Also, we can purchase SRB's temple books from them. They are hard to get these days !