Leave them an email and see if they have a used one they will sell you, otherwise buy one of the new ones. You could also leave Curt Palme a message. He seems to have a bunch of spare parts. I believe others have used a unistrut method but I am unfamiliar with what is involved with that method. Good luck.
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more!