Place ladyfinger biscuits on a rimmed baking sheet and drizzle with dessert wine; let stand 5 minutes. In a large bowl, whisk heavy cream with confectioners' sugar until soft peaks form.
Place 5 soaked ladyfingers in a 2-quart serving bowl. Top with 1/3 cup lemon or raspberry curd, then half the whipped cream. Top with remaining ladyfingers, 1/3 cup curd, and remaining whipped cream; top with remaining 1/3 cup curd. Refrigerate 3 hours (or up to overnight) before serving.
This recipe was ok, pleasant but not amazing. I doubled it, which used all the lemon curd. The recipe is quite expensive, between buying the lady fingers and the dessert wine (I didn't use Sauternes, just another dessert wine suggested by the wine store owner), and I'm not really sure it's worth it. It's lemony but not quite as lemony as I like.