I never got asked either. Having said that, I have the mechanical breakdown warranty on my AA cover. It's about £70 a year and covers you up to £500 worth of repairs if the fault causes a break down requiring the AA to come out. We had this cover on the wife's previous Saab and they paid up straight away when the alternator went on it. I know the RAC also do this cover now as they quoted like for like on renewal last year.
Touch wood though, 3 years and 8 months old and nothing's needed replacing yet.