I think the effect you are after is an ace assembly that Jim Sawin published in his 'The Card Expert' column in GENII. This would have been about 3 or 4 years ago. Unfortunately I don't know the title (although I remember the use of a Dean Dill equivoque idea).
You could try checking the Indexes for GENII which are published every December. Also you could contact Jim at www.jimswain.com
Better still, does anyone else remember the Jim Swain ace assembly? I think he published two methods for 'ace assemblies' in the same issue. The first was a 'difficult' method and the second was an 'easy' method. The Equivoque sequence is used in the easier method...