Cameroon, Find a local potter, they will have some old ones or can lead you in the right direction. I've got a bunch, enough for two large kilns, so if anyone has a photo of one of these, I've been looking for something to use these on. I got them from a potter who was moving to Ashville and didn't want to take them.
4est, great idea, I may try this just for fun. I usually use an acetylene torch to heat my stuff, turning it off after each heating, gets to bothersome, but I'm glad I have it.