Mmmm, this sounds delicious. Lemongrass has become a staple in our kitchen - perfect for soups. I have Kava root, and could powder it, I suppose. Don't have these specific juices, but could easily figure out alternatives.
Lemongrass : ...Egyptians used it to enhance psychic abilities as well as to enhance dream recall. This is an essential ingredient in our favorite Kava recipe, which calls for 1 oz of powdered Kava root, 24 oz of coconut water, 12 oz of pineapple juice, 2oz of coconut milk, 1 tablespoon of lecithin, and 1 palmful of Lemongrass. Honey is then added to taste, and the entire mixture is placed into a blender for 5 minutes. Finally, the mixture is left to sit for 30 minutes, strained, and enjoyed.
Added bonus to having lemongrass around - our kitten loves to play with the outer stem of a lemongrass stalk. Hours and hours of amusement ensue. Literally.