DIYHiFi.org

Voilà:

http://www.selectronic.fr/soussousfamil ... =11&page=1

http://www.ulmer-trafo.de/content.php?s ... details=11
http://www.ulmer-trafo.de/content.php?s ... details=28
(must be in my neighborhood)

I run my line power from the wall into a 1500VA toroidal transformer with dual 120VAC secondaries - - a fully isolated and screened unit from Plitron in Canada.
It's housed in one of those die-cast Hammond enclosures they use for waterproof outdoor applications, bolted in very securely, with a nice power cable connecting it to the wall. The transformer is protected with a breaker and a soft-start circuit (one of those ones that shunts it for half a second through a big power resistor).
It's a centre-tapped transformer. The primary is connected to live and neutral... the house ground/earth is connected to the box, and at one point, through an RC ground-isolator circuit, to the centre tap of the transformer's secondary.

Now, there are caveats about using balanced power.
First, and crucial, is this: Your ground is going to be 120V, or 60V, above your "neutral." If you try to plug in a piece of equipment that ISN'T attached to your balanced-power isolator, you could blow something. Or give yourself a shock.
Second, you need to open up your components and make sure they have the AC section wired properly - - i.e. with "live" and "neutral" going to opposite legs of the power transformer's primary and the "ground" going to the chassis, if anything, and THE AUDIO GROUND NOT CONNECTED TO THE AC GROUND. Just to be safe, and to make sure you're actually getting the benefits of balanced power.