To my knowledge no one is currently producing one. I have been looking for a set of plans that are no longer published from Model Airplane News. The plans were for a S6-B .19 sized engine. I have posts on many of the R-C forums but have had no luck so far in finding a set. I was sent a set of plans for a S-5, also a .19 size. Sam was gracious enough to send them to me and allowed me to make a copy of them. If you come across anything let me know and I will do the same for you..

Thanks!!
Bud