We got it at Puckett Greenhouses in Ararat, VA. If you're interested in building one, I suggest you search for greenhouse suppliers close to home for two reasons. Firstly, the parts arrived on a flatbed truck so I can imagine shipping would be cost prohibitive if it had to travel a long way. Secondly, we were able to find greenhouses locally that were built by this supplier and took a ton of detailed photos for reference. The instructions that came along with the flatbed truck were just two pages, including a diagram. The photos were really really helpful.