Directors are just like politicians in that they respond very quickly when their position is threatened. The fastest way home here would be if a female candidate nominated for these boards but promised to withdraw if the board agreed to find a suitable female candidate.

http://www.womensagenda.com.au/talking-about/opinions/item/7226-the-20-remaining-all-male-boards-on-the-asx-200-what-next-for-them

http://www.womensagenda.com.au/talking-about/opinions/item/7241-women-s-work-is-satisfying-pity-about-the-pay