Oops.
Unfortunately, even if we could find such people the current media generated hysteria among the British people about the wonderfulness of the Monarchy would make any change very difficult.
Just look at how the British media expended its entire energy publicising the death of Lady Diana, in such an intense way as to excite public hysteria. The media are currently going mad with the Jubilee celebrations. The effect of all this media propaganda must be to brainwash people who haven't formed opinions about the Monarchy, especially the young, into becoming ardent Monarchists.