Bring the water to a boil in a small saucepan. Once boiling, add in the pear, maple, pumpkin, ginger, pumpkin pie spice, and lemon juice. Cover and simmer for 5 minutes. Turn off the heat, add in the chai tea bag and vanilla, and let sit until fully cooled. Using a slotted spoon, remove all of the pear, ginger and tea bits and set aside.