I'm aware of a few alternatives to the star fangled nut, most are expanding bungs or wedges; but the one that can never ever slip is the headlock by Azonic, Gusset, Amoeba and others. It's a long bolt that reaches all the way through the steerer tube and the nut is on the bottom of the steerer so it doesn't use friction to keep it in place.
I haven't used a proper star nut setter though, and hopefully that'll do it.