Yes it looks like I've got a good lead on bituminous coal pretty close by. Going to make a trip out there in the near future.
The Mark III JABOD with the bricks looks like it has a more stable fire pot. I'm going to try and shape mine like that next time I get to fire things up. I need to take some time and get another mount for my anvil first. The stump I was using was a little rotty in the middle, and when I picked it up to move it back in the barn the whole inside of the stump fell out onto the ground! Serves me right, I was using the stump the anvil came with, which was sitting in the bottom of someone else's barn for who knows how long...
I've also stumbled onto a local blacksmithing group in Williams Grove, PA that I am going to try and meet up with.