Riker: Like Worfzara, I had a heck of a time finding OC 703 to make acoustic panels. I looked at ATS, then decided to go the DIY route as well.

Luckily, I found a company willing to sell me 4 sheets of 4X10' duct board (1 1/2" thick). Made frames out of 1X4" pine boards, stretched black broadcloth over the frame, and filled it with two sheets of the duct board back to back. Please see pics:

http://i127.photobucket.com/albums/p136/bweasner/1.jpg
http://i127.photobucket.com/albums/p136/bweasner/2.jpg
http://i127.photobucket.com/albums/p136/bweasner/3.jpg
http://i127.photobucket.com/albums/p136/bweasner/4.jpg
http://i127.photobucket.com/albums/p136/bweasner/5.jpg

Each panel ended up costing $9 US and the full panels weigh about 14 pounds. I hung them from the wall using two picture hangers, then anchored each panel to the wall using 4 small L-shaped brackets painted black.

Trust me, if I can make these panels, anyone can. If you can't find any OC703 or duct board, order the insulation from ATS and just construct the panels yourself...they are super simple to make!