Sure, you may want to consider vegetable juicing.
That would be a better replacement.
I'm not sure that the body handles all that Sugar in the maple syrup while eating regular as well as it does during the cleanse.
During the cleanse its necessary. Obviously as a meal replacement its just not necessary.
That's why I'm thinking vegetable juices if your just looking for meal replacement.
Don't worry you wont be in any way fasting if you do have the lemonade as a meal replacement.