I built my own with rip stop nylon from Joann's. Like Robert, I built two side panels. Besides black side panels, I found a plasticized white curtain liner that completely blocks light, but since it is white, it also reflects light. It is narrower than the black material or the rip stop nylon, so it doesn't fit my frame as well. I just clamp the short end with binders clips rather than the elastic pieces I sew on to the corners. So now I have back side curtains and white side curtains. I use left over black material to make skirts for the bottom to block light when the panels are on their legs. These aren't hemmed and I just stick them on with binder clips. I think my panels are about 6x5, but they are packed away right now and my memory isn't that good. They are actually the width of whatever the nylon came out as when it was hemmed, so I'm sure it isn't exactly five feet unless I just got lucky.