@irontoenail - Unfortunately, it might be too late to save the other tigers. The Bali tiger went early because it lived on an island and there was only so much room to go around. Tigers need a lot of space to feel comfortable and to breed and thrive. While there is still some forest around for them, it's often only in small pockets that aren't big enough on their own to support a breeding population.
And to get to other pockets, tigers have to cross land inhabited by people. No matter how much they like tigers in theory, they aren't going to celebrate them wandering through their backyards at night.