I don't know if anyone would be interested in this or not, but I had to replenish my supply of wood charcoal that I use at the University for color case hardening and charcoal bluing. The last place I purchased it from was Berger Brothers, but they apparently have stopped carrying the granular charcoal, Brownells is also out of stock (probably because they buy from Berger Brothers). After doing a bit of research I found a company in California, Lazzari, and they sell a very similar hardwood granular charcoal that is the right mesh size for our purpose.
Lazzari Fuel Company
11 Industrial Way
Brisbane
CA 94005
They call it Lazzari's Powder Charcoal and it comes in random particle size from 3mm to 7mm. Their price is $13.35 per 40 pound bag. I wanted something closer to the 3mm size, so I ordered 4 bags of it thinking I would just use a sieve to get the bigger particles out. As it turns out the stuff I received looks almost identical to the mesh size that Brownells was selling--and I now have several years supply of it on hand. So if you need charcoal this seems to be a good place to purchase from, they ship fast, and were pleasant to work with.