Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Has anyone built this Coomber steam engine, first sold by A-1 Machine of Flushing, MI and then done on CNC by Carl Hoyer of California? I have acquired the finished ring that I believe is from A-1, but no drawings or other parts. I believe it was a bar stock engine, from the pic of the finished engine, but I need drawings.