I'm not sure if this is the right place for this, so if the Mod's need to move it, please do.
A friend sent me this link,
http://www.whispergen.com/ a while back. It looks like an interesting concept.
Basically, it's a Stirling engine that puts out 12 or 24 volts, and the heat from the unit can be used for heat as well. We don't need one, but I thought that it may be just the ticket for someone out there....
I have emailed their head office, twice, but have never heard back from them. I see that they're based in New Zealand so maybe someone down that way has heard of them?