I can help with some of the suppliers, but you'll have to get the other info from them directly. I've come across these from various research and surfing on the internet. The only company I have real experience with is Auralex and even then, I just have a set of Mo Pads for my center channel speaker. Others may be able to give you real experience.

http://www.auralex.com/
http://www.tubetrap.com/
http://www.owenscorning.com/around/sound/acoustic.html

Good luck!