I have this in Nicholas Einhorns The practical Encyclopedia of Magic.
It is called trapped and gives the same result though it must be a different method as it uses no gimmicks.
"The two red queens are placed to one side. A card is chosen and returned to the deck, which is then shuffled. The queens are cut face up into the middle of teh face down deck. In an instant (must be magic!) the cards are spread on the table to reveal one card trapped between them. It is the chosen card."
Taken from the description, as you can see not the same as your routine though and only uses a dbl lft and a break.
This book is a fiver from the works bookshop.
Hope that helps and keep inventing

Good stuff.
BaB
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