Alternative to Ambersand Lemonade?

Hello all. Australian here.

My mum has recently given up VB as her drink of choice for a weight loss journey. Alcohol is a part of her diet and she’s been searching for something to replace it with. She has really liked the Ambersand Lemonade but they aren’t seemingly clearing out all stock. Does anyone have a suggestion comparable to this drink with zero to minimal calories?

Thank you in advance for any help you can provide.