The wheels of justice turn slowly. But they turn! Non-subbers to the paywalled AFR can try this link.
If she elects to go ahead with the class action, imo Amanda Banton will pursue this well. She has a top notch reputation and leads an experienced team: https://bantongroup.com/about-us/
Contact details are at her website. No doubt they will have a signup form if this proceeds but in the meantime interested shareholders can probably just pop a basic general note through to them asking to be kept informed and indicating support.