I wrote to Vivid Toys recently about their current Thunderbirds Are Go toy line and the possibility of a Zero-X. Reply below:
Thank you for contacting Consumer Services.
Unfortunately we currently do not have any plans to release a Zero X toy as a part of this range, however we will be hopefully expanding the range in future and have passed your comments onto our development team for their future consideration.
If you have any additional enquiries, please do not hesitate to contact us.