Resonix Barrier
"I was trying to figure out how to do block off panels using the common choices by making a custom panel with ABS etc. I ordered Barrier instead and I am very thankful I did. This product is the way to go, IMHO. It worked great, was easy to make panels out of, and was everything advertised - a real time savor yielding a pro block off plate. I used the recommnded hardware of Rivnuts, button head screws and flat washer (5mm). I can't imagine doing this any other way."