Good rear surrounds ceiling mounts ?

Hi, I currently have a 5.1 set up in our bedroom. To go 7.1, I do not have room behind me to put rears on stands. I have about 6 feet of space behind our seating but it is used for when you come up the stairs and in to our Bedroom.

I have Definitive Technology BP2X`s I would like to mount on the ceiling .
So what are some good mounts.

Thanks!