The picture above shows the vacuum bed with the aluminum frame that the plastic used to create the parts is attached to. I used 0.75"x0.75"x.06" aluminum angle stock to create the frame, this angle stock should be available at most hardware stores. The pictures also shows the vacuum source attached to the vacuum bed.
The picture above shows the heat source, and the plastic support frame. The plastic is attached to the plastic support frame with some clamps that I purchased in an office supply store. The heat source is an electric grill that I think was purchased at Walmart. It works as pretty good heat source to get the plastic nice and soft. I was letting the plastic sag about an 1.5" before placing it over the mold and then firing up the vacuum.
Heres a picture of some formed canopies. The plastic I used for the canopies shown above is from Sig, and comes in sheets of .015"x17"x17". Notice the formed dents around the edge of the canopy that hasn't been cut out yet. Those dents are from the clamps used to hold the plastic to the frame, as the plastic gets warm they leave some marks. Its good to use quite a few of these