Here's what I did.
-Went to Home Depot

-Bought a 4'x2' sheet of 3/4" thick MDF. I had a guy there cut it into 1x1 squares.
-Got a 12' section of 6" diameter PVC piping, and 4 "closet flanges" that fit the 6" diameter piping. Picked up some PVC cement too. (I bet you can get them to cut the PVC pipe to length for you, I didn't feel like finding a guy to do it though)
-I wanted to weigh mine down and kill some of the resonance too, so I bought a 50lb bag of sand.
-You'll also need some wood screws too, no longer than 3/4" long.
-So you draw 2 lines from corner to opposite corner on the 1x1 MDF to find your center point.
-Place a closet flange against the MDF and screw it in place (pre drilling helps). Do this for four pieces of MDF
-Cut the PVC pipe to length
-Apply cement to one end of the PVC pipe and insert into the flange of one of your 1x1 MDF pieces.
-I filled mine about halfway with sand
-Apply cement to the other end of the pipe, and cap off with another 1x1 MDF and flange assembly.
-Repeat for the other one
-You can paint them, but I thought they looked fine the way they were. A little paint thinner takes the blue print off the PVC easily.