Combine the hot tea and sugar in a heatproof bowl; stir until the sugar dissolves. Add the lemonade concentrate and orange juice concentrate; stir until blended. Let stand until cool, about 1 hour. Stir in the bourbon. Pour the bourbon mixture into a large freezer-safe container, and freeze until almost firm, about 8 hours or overnight. Let stand at room temperature until partially thawed, about 1 hour. Spoon into glasses, and serve immediately.