I'm glad you posted this because I am wondering the same thing.
Also looking for real charcoal. According to a post in another thread, New York Kam Tang Soot Bull House is the only place that still uses charcoal. If that's true, it makes me very sad, as I had a very disappointing experience there the last (and only) time I visited and vowed never to return.
These are a few months old - and include non-BBQ - but K-town doesn't move at the speed of light. (OK, maybe the Korean Fried Chicken Wars do/did.) You might find a few of interest and then conduct your own search here, by name of restaurant.