Waldo Street Pottery
Chumono
Here's a list of vendors from the show's producer. I don't see Lang on there, checking in to see if this is an oversight.
Julian Adams Adams Bonsai
Russ Adams Nitju Clayworks
Eli Akins Waldo Street Pottery
Sonny Boggs Boggs Bonsai Pottery
Ken Buechele Buechele Bonsai
Mike Cartrett Palm Beach Bonsai
Mark Comstock Comstock Trees
Mark Issenberg Ash Pots
Harold Johnson Triangle Bonsai
Ed Lauer Lauer Bonsai
Michael Livingston Livingston Bonsai Stands
Cullen Mariacher American Bonsai
Brian Mercer Bonsai Learning Center
Owen Reich Bonsai Unearthed
Martin Sweeney Sweeny Trees
William Valavanis International Bonsai
Julian Adams Adams Bonsai
Russ Adams Nitju Clayworks
Eli Akins Waldo Street Pottery
Sonny Boggs Boggs Bonsai Pottery
Ken Buechele Buechele Bonsai
Mike Cartrett Palm Beach Bonsai
Mark Comstock Comstock Trees
Mark Issenberg Ash Pots
Harold Johnson Triangle Bonsai
Ed Lauer Lauer Bonsai
Michael Livingston Livingston Bonsai Stands
Cullen Mariacher American Bonsai
Brian Mercer Bonsai Learning Center
Owen Reich Bonsai Unearthed
Martin Sweeney Sweeny Trees
William Valavanis International Bonsai