Rock-Dominique Prévot, a world-renowned fashion designer of elegant evening gowns, was in town to support the Patrons of the Prado’s annual gala. The organization, established 13 years ago, helps fund 11 museums and art organizations in Balboa Park. Prevot’s clients have included Nancy Reagan, the late Elizabeth Taylor, and Princess Stephanie of Monaco, and one lucky guest at the gala, the highest bidder, will now have a gown designed just for her as part of the elegant “Paris Holiday Package,” which includes stays at the world-famous Hotel Le Bristol, at the Duke and Duchess of Windsor’s private country estate Le Moulin, and at the private Chateau de Yaucourt-Bussus.     JANESHIOMI