I have the BD Cestus as 20-814, the Firebee as 20-804. No sculptors for either of them plus the BD Battlemaster and BD Hunter Tank. Their packaging didn't list sculptors, as far as I'm aware. I'll have to check the bases on what I can, later.
For now...
20-806 Hunter Missile Tank, 2nd sculpt = Tom Meier
20-838 Battlemaster, 2nd sculpt = Julie Guthrie
20-848 Orion = Tom Meier
20-854 Hunchback = Tom Meier
20-870 Whitworth = Julie Guthrie
20-875 Assassin, 1st sculpt = Robert Charrette