I actually had a ACAAN like this. Spectator can name any card and any number, you lift up the deck and do a p*** from the back if necessary (just roughly, no need for exactness), explain what you're about to do, show the first card while you explain it, and get to their number which is their chosen card at their chosen number.
The only problem I have with it is that it's difficult (in either your 'CAAN' and the 'ACAAN') to add some suspense in the end and keep it all open and deceptive at the same time. Other than that, me likes.