Damn I wish my vanguard ira supported it today before it's too late.
The point of the OP is that you CAN do it today. You do not need to wait for Vanguard, Fidelity, or anyone else to support it. It just takes a modest effort and expense to set it up.
If there was a way to do it today then why hasn't anyone shared further details? I've put in more then a modest effort and I have not found how this would be done thru most traditional institutions.
Perhaps those who have already done it are trying to keep it a secret. Maybe they're afraid if too many people start doing it, the IRS will change the rules and disallow it.
I'm personally hoping that lots of libertarians will do it so that we can perhaps win some elections in the future and achieve liberty in our lifetime.