For the rice pudding: Add the cream, milk, agave, cinnamon stick and 1 cup water to a 10-quart saucepot or large Dutch oven and bring to a boil. Add the rice and reduce to a simmer, then cook, covered, stirring occasionally, until the rice is tender, about 20 minutes. Remove from the heat.
For the bourbon raisins: Add the raisins, granulated sugar, bourbon and 1/2 cup water to a 2-quart saucepot and bring to a boil. Lower to a simmer and let cook for 3 minutes, then drain and add to the rice pudding.
For the passionfruit sauce: Cut the passionfruit in half and scoop the flesh and seeds into a bowl. Stir in the condensed milk.
For the whipped cream: Whip the cream with the confectioners' sugar until it holds soft peaks.
For serving: Add a 2-ounce ladleful of the rice pudding to a serving bowl, then add a scoop of the ice cream, the passionfruit sauce and a 1-ounce ladleful of the rice pudding. Top with a scoop of ice cream and a dollop of whipped cream. Repeat to make 3 more.