Stirlingengineforum.com

This looks exactly what we need:
http://www.ebay.com/itm/Mini-Micro-Smal ... 2101871316

HI CB - That's perfect and they work on low RPM. I am using the same one, but slightly larger as I can get 2 Amps from mine at 12 volts.
I posted a picture of it in my post re beam engine. I will show you another pic.
Trev

Here's the photo of the generator CB. It's a little beauty and I will be getting more of these when I can - Thanks for the Link
Trev