http://www.buildmyowngreenhouse.com/...onnectors.aspx
I was pondering an Eliot Coleman Scissor door. It's just two pieces of pipe hinged at the end peak. They now sell a "bottom latch," but it looks like it clamps to a baseboard end pipe I don't have.
The door is a neat concept, but I'm not sure about securing and anchoring everything, both when closed and open. The swing of the doors is confusing. Trying to make it all workable and secure on a windy day sounds challenging.