John Hanna is the AMYA Class Secretary for the N12M, and also one who has done his level best to make the boat available through his "one stop shop." I purchased mine as a "semi-kit," from John, including Rod Carr sails. I'm happy to answer any questions about the boat/build.
As of this edit date, John Hanna no longer sells a kit, nor has his web-site. The molds have been turned over to the Class, with Don Dixon, of the Helmsmen MYC, Long Beach, CA., as Class Secretary.