There's an organization called The New Road Map Foundation, and info can be found at financialintegrity.org
IDK what they actually do, what programs they run. But mustachian principles really mimic those of the new road map foundation, started by the authors of Your Money or Your Life.
There are also broader global organizations- New Economy Network, New Economics Institute (these may have merged to one organization.)
They may be a good place to start and get ideas on how you can proceed/get involved.
In FI/RE, (t-minus 14 years give or take?) I would love to act in some capacity to teach people this stuff.