You can always try one or two... i would cut the clones from the top side of the plants. since bushmaster stops the vertical growth and cause more lateral branching. Your best chance is taking a clone or two from the top side branches....
always worth a try. until then you will never know.
(Side story: People use to say you could not take clones from a pre-flowering plant,it just wouldn't work..Now a days i know many people who, have had to take clones in pre-flower for one reason or another. They all got roots and their for did what the Gardner needed in that crucial moment.)