You might try emailing George(at)utterpower.com. I've seen one running and it looked impressive, though it's more expensive and won't compete head on with the ST generators.Â
Quinn
[Edit: Though the PMG might be slightly more efficient than an ST, that hasn't yet been proven. Its real advantage is in its simplicity. Totally enclosed, fan cooled, no brushes or slip rings to wear, no rectifier to fail. It's a more rugged generator that should last longer than an ST in a remote location.]