Need recommendation for very tall speaker stands...

Question

I need to configure the rear speakers in my home theater. In order to set them up according to the Dolby Digital recommendation, I need to get stands which are around 52" tall. The problem is that the tallest stand I've been able to find is around 40" and not very sturdy.The speakers (Monitor Audio Silver 3i) are a little heavy so I need to find a strong stand that is 52" tall or some sturdy wall or ceiling brackets.Are there any recommendations (please include a web link of possible)?Thanks,Paul