What can I substitute for grade b maple syrup?

ok so, I decided to try the lemonade diet (master cleanser) but I'm really having a hard time finding grade b maple syrup here in Philippines, I currently live here and I already went all over the supermarkets and organic shops but I can't find it. so, do you guys and girls have any idea if there's an substitute for grade b maple syrup for that diet? thanks!
What can I substitute for grade b maple syrup?
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