Sorry for joining this conversation so late.
My paternal grandfather was once president of the Philadelphia branch of the Boslover Assoc. I know that because we have the portrait of him taken as president around 1944. His name was Hyman (Chaim) Green. He died in 1952 as I recall. I do not remember any of his Boslover associates but I do recall their headquarters in down town Philly. That is where I first saw his portrait hanging on the wall.
Would love more info if anyone has.