I contacted Lee Rainey, regarding the non-profit. Here is his reply.
Yes, it still exists, and is scheduled to do so through 2019. We were advised for liability reasons to keep it alive for three years after the convention.
I'm not sure how "reusable" it is. After all, its name is "36th National Narrow Gauge Convention, Inc." though very little of the legal verbiage emphasizes the 2016 event specifically.
However, creating such a corporation is very easy in Maine and very cheap and we could explain how to do it.
Lee
Lee also has cost information for last year's NNGC, and is willing to provide it, if James' proposal goes forward. He is excited to hear that a grassroots effort has begun to bring the NNGC back to Maine.
I still have the list of modular layout that were at the convention, as well as contacts for each. I can check with the Clinics chairman and Vendors chairman to see if they still have their information.
Jeff S.