Simpson, married to his childhood sweetheart for almost 19 years, had walked out on his wife and kids and into the arms of a younger woman. The breakup surprised his wife, his friends and even Simpson himself. Looking back, he says, it was a classic midlife crisis.
In that we have already provided the definitive answer to this question elsewhere (relying on rum extract), we assume your follow-up is seeking a non-alcoholic substitute for rum (as extracts can be as alcoholic as or more alcoholic than the spirits they replace).
I have several very pliable, very pungent vanilla beans on hand. (I use them for rum and bourbon infusions - http://chowhound.chow.com/topics/5516...) I have read enough to know that a substitution of bean for extract is a viable option, but no one seems to share a ratio.