I am making Gordon Ramsay's Cauliflower and Sorrel (with caviar no less) soup for my gourmet club this evening. Waited until today to get the Sorrel and CANNOT FIND IT ANYWHERE! Any suggestions? I have searched all Bristol Farms, Whole Foods and Gelsons. Is there any substitute? the bummer of it all is I only need a little bit (my guess is it is potent stuff- it is the garnish, but is important enough to be included in Chef Ramsay's title of the dish.