I find that although risky org level leadership may be difficult to find it may be easier to find it at a level down. Some departments/divisions have risk-taking leaders and progressive L&D needs to find them and support them. Dare I say exploit them. Mostly I believe risky leaders (in this respect) are made not born. Working at the individual and department level to make and show a transformation can serve to accelerate the change that's needed across the org. Act local, think global. :)