Tat Tropical Illusion in Thousand Oaks had a rock of a few heads on it. I forget the price but it sure wasnt cheap. Call them to see if they still have it. If you walk straight down the aisle between the coral tanks (on the right) and the fish tanks (on the left), straight at the end is a small tank. The dendros were in there.
Tat Tropical Illusion
1374 N Moorpark Rd
Thousand Oaks, CA 91360-5224
(805) 495-3220