ZD, I got mine from Steve Nugent at Empiracal Audio. You can't get the Paul Haynes units new anymore, but someone else who can keep up with the demand is starting to make them I was told. Steve uses them in his high end DAC's external supplies also.
I've recently heard other Mac Mini servers set up like mine with Amarra with the same version at mine. He was using another power supply and even he was jealous of mine. Steve really seems to understand the tech side better than most I've encountered in this business. JMHO and I"m sure any of the other great supplies would work wonderfully for him. The whole idea of clean power and plenty of it is what any components is looking for and there are plenty of great and easy to get components out there as this thread has shown.