I have purchased 2 sets of speaker stands off of ebay. Two for my front left and right and two for my left and right rears. But the problem is: I have a 6.1 setup and only need one more stand for my center surround. Is there anywhere that I can get one speaker stand. I am having to put all of my speakers on stands for the room layout issues. But I hate to spend money on two stands when I only need one. And I need it to be adjustable or at least 40" in height to get over the back of my couch. Any help is appreciated.