Tim I would also guess that what you are looking for is the Zilch Lil Duper. John Ponds Old Time plan service had this plan as well as many others however apparently they have closed the doors and looking for a buyer the guys have been talking about it in the thread below.
Another alternative is to go to www.rcwatch.com
and post in the controlline forum there and I,am sure you might find something. several months ago I visited the shop I used to hang at in the early sixties in high school, ED's Covina Hobbies, Covina Ca. , thats the L.A. area and Ed who has to be in his ninetys is still kickin. Its a very hole in the wall old time shop with a whole wall of Ukie kits still some oringinal and maybe repos. I did see a Zilch kit but not sure which one. Don,t have the number but I think the area code is 626. He may be able to help.
Sorry I couldn,t help more